Computer Repair Mastery Course

Advance Technical Repair of Laptops Motherboard

With this online course you will learn all that there is to learn about laptops and how to repair them. You will learn how to take a laptop apart, advanced motherboard repair, how to hack a password, and the tools and test equipment that you'll need. You will also learn the best secrets to setting up your own laptop repair business, how to get the cheapest parts, how to refurbish broken laptops, how to get a steady stream of repeated business, and the best tip to making money in the laptop business that you will find anywhere. You don't have to be an electronics or computer expert now; just take the knowledge that you already have and we'll build on that so that you will learn the best tips and tricks that will help you build the best laptop business possible. More here...

Advance Technical Repair of Laptops Motherboard Summary

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My Advance Technical Repair of Laptops Motherboard Review

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Removing the System Board

Separate the network cable from the system board 14. Remove the three M2.5 x 4-mm captive-washer screws from the system board. 16. Lift the front of the system board and work it out of the back panel. If necessary to help release the system board, pull outward on the top of the plastic near the back left corner of the bottom case (see the small arrow at the far left in the following figure).

Replacing the System Board

Install the modem daughter card that you removed from the old system board in the replacement system board. 2. Place the system board in the bottom case. 3. Reconnect the status light (LED) cable to the system board ZIF connector. 4. Reinstall the four M2 x 4-mm screws that secure the system board to the bottom case. Xa NOTE After replacing the system board, enter the computer service tag sequence into the BIOS of the replacement system board.

Installing the System Board

Perform all the steps in Removing the System Board in reverse order. Xj NOTE After replacing the system board, enter the computer Service Tag into the BIOS of the replacement system board. 3. Insert the floppy disk or CD that accompanied the replacement system board into the appropriate drive. Follow the instructions that appear on the screen.

System Board Assembly

The system board's basic input output system (BIOS) chip contains the system service tag number, which is also visible on a bar-code label on the bottom of the computer. The replacement kit for the system board assembly includes a diskette that provides a utility for transferring the service tag number to the replacement system board assembly. NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. 9. Remove the following two screws from the system board assembly (see Figure 19) NOTE Locate these screws by looking for the white circles on the system board that outline the captive washers. 10. Lift the system board assembly out of the bottom case assembly. Be sure to transfer the memory module(s) to the replacement system board assembly. Insert the diskette that accompanied the replacement system board assembly into the diskette drive, and turn on the computer. Follow the instructions on the display screen. After replacing the system...

Figure 23 System Board Assembly

Lift the system board assembly out of the bottom case assembly. Be sure to transfer the memory module(s) to the replacement system-board assembly. Insert the diskette that accompanied the replacement system board assembly into the diskette drive, and turn on the computer. Follow the instructions on the display screen. After replacing the system board assembly, be sure to enter the system's service tag number into the BIOS of the replacement system-board assembly.

System Board Screws

Bios System Board

The system board's BIOS chip contains the system service tag number, which is also visible on a bar-code label on the bottom of the computer. The replacement kit for the system board assembly includes a diskette or CD that provides a utility for transferring the service tag number to the replacement system board assembly.

Dell Latitude C800 Service Manual

Removing and Replacing Parts System Components Hard Drive Fixed Optical Drive Memory Module Mini PCI Card Assembly Keyboard Assembly Display and Bezel Assemblies Microprocessor Thermal Cooling Assembly Microprocessor Module Video Graphics Board Palmrest Assembly Reserve Battery System Board Assembly Battery and Modular Bay Latch Assemblies Battery Charger Board LED Board Fan Assembly RJ-11 RJ-45 Board

Removing the Memory Module Modem Cover

Xa NOTE This procedure covers removing and replacing the memory module located under the memory module modem cover on the bottom of the computer. A second memory module resides on the upper surface of the system board under the critical component shield. To replace the memory module under the critical component shield, perform the procedure for removing the palm rest up to and including removal of the critical component shield. Then replace the memory module.

Mini PCI Card Assembly

You must remove the optional Mini PCI Card assembly before the system board assembly can be removed. A Mini PCI Card assembly may consist of a modem, a NIC, a modem and NIC combination, or a wireless NIC. A modem, NIC, or modem and NIC combination must be connected to the wiring harness as appropriate a wireless NIC must be connected to the system's internal antenna.

Replacing the Keyboard

NOTICE To avoid damage to the connector pins, press the keyboard connector evenly into the interface connector on the system board, and do not reverse the keyboard connector. 2. Connect the keyboard connector to the interface connector on the system board. The keyboard connector may have a label showing the correct orientation of the keyboard connector (relative to the display) in the system-board interface connector. 8. Remove the two M2 x 3-mm screws that secure the display-feed flex cable to the system board. Q NOTICE When reconnecting the display-feed flex cable connector to the system board, push down on the top left and right ends of the connector. Pressing on the center of the connector may damage resistors and compromise EMI protection in the computer. remove it from the interface connector on the system board.

Caution Before performing the following procedures read the safety instructions in your System Information Guide

Loosen the captive screw that secures the display cable to the system board, and release the cable from the four cable-routing clips. system board connector 5. Pull up on the pull-tab that is attached to the display cable connector to remove the connector from the system board.

Precautionary Measures

Remove the two 3-mm screws securing the video card (see Figure 4-10). Gently pull the video card off of the connectors on the bottom of the system board by lifting it at the notches located between the screws. Do not rock the card to remove it because this may damage the connectors.

Caution Before performing the following procedures read the safety instructions in your Owners Manual

Q NOTICE To avoid damaging the system board, you must remove the main battery before you begin working inside the computer. 5. Pull up on the pull-tab to disconnect the modem from the modem connector on the system board. Q NOTICE Do not disconnect the modem cable from the system board. 2. Align the connector on the bottom of the modem with the modem connector on the system board and then press down on the right side of the modem to seat both connectors.

Replacing the Modem Daughter Card

Use the screw and boss holes at opposite corners of the modem daughter card to align the card, and press the card into its connector on the system board. 3. Install the M2 x 3-mm screw that secures the card to the system board. You must remove the optional Mini PCI wireless modem (if installed) before the system board can be removed. A wireless modem card must be connected to the internal antenna of the computer.

Computer discharge static electricity from your body before you touch any of your computers electronic components You

The system board's BIOS chip contains the Service Tag sequence, which is also visible on a barcode label on the bottom of the computer. The replacement kit for the system board includes a CD that provides a utility for transferring the Service Tag sequence to the replacement system board. 16. Remove the three M2.5 x 5-mm system board screws from the hard drive cage. 17. Remove the two M2.5 x 5-mm system board screws from the optical drive cage. System Board Dell Inspiron 1100, 5100, and 5150 Service Manual System Board Dell Inspiron 1100, 5100, and 5150 Service Manual 20. Lift the front of the system board out and away from the base plastics.

Replacing Memory Modules

Align the memory module's edge connector with the slot in the center of the memory module connector. The memory module is keyed, or designed to fit into the connector in only one direction. The slot on the system board is notched so that the memory module can be firmly seated only one way.

Removing the Microprocessor Thermal Cooling Assembly

Loosen the four captive screws that secure the microprocessor thermal cooling assembly to the system board. 4. Insert a screwdriver into the recess in the EMI shield under the front-left corner of the thermal cooling assembly, and pry the assembly up and away from the system board.

An explanation of whats going on with the laptop

Also, the chip containing the password may be in a different location on some motherboards, but it should be able to be found by reading the numbers on the top of the chip, although a magnifying glass might be necessary. Take out the hdd and use a ac adapter of the motherboard behind the PCMCIA slots. Short circuit Pin 3 and 6 wile booting The Chip is on the top side of motherboard, under MMC2 processor module. You have to solder two smal wires The Chip is on the top side of motherboard, under MMC2 processor module. The Chip is on the bottom side of motherboard, under the PCMCIA card slots. The Chip is on the bottom side of motherboard, under the PCMCIA card slots. The Chip is on the bottom side of motherboard, under the PCMCIA card slots. The Chip is on the bottom of the motherboard just to the left of DIMM 1. The Chip is on the top side of motherboard, under MMC2 processor module. The Chip is on the bottom side of motherboard, under the PCMCIA card slots. Chip is on the back side of...

Inspiron XPS Gen2 M170 9300

Dell Latitude Motherboard Power Shorts

This laptop does have a 24C02 chip on the back of the motherboard. (I took it all the way apart in order to get to the chip, almost every single screw in the whole unit has to be removed.) Although the 24C02 chip is there, I don't know what, if anything, it is used for. The CMOS battery is held onto the motherboard by a sticky glue. Finally the CMOS battery plug is pulled loose from its connector socket on the motherboard. For anyone who is curious, or feels the need to do something with this laptop other than clearing the passwords these 2 last pictures show the approximate location of the chip. It is on the bottom of the motherboard.

Beep Codes and Error Messages

If the display cannot display error messages during POST, the computer may emit a series of beeps that identifies the problem or that can help you identify a faulty component or assembly. For example, one beep, a burst of three short beeps, and two more single beeps (beep code 1-3-1-1) means that the system has encountered a DRAM refresh error condition, probably caused by a faulty system board. Table 3-1 lists the beep codes that may be generated during POST. Most beep codes indicate a fatal error that requires replacement of the system board or other corrective actions before the computer can operate.

Field Replaceable Parts and Assemblies

System Board Assembly System board assembly, CPxxx,service kit* System board assembly, CPixxx,service kit* System board assembly with system board and processor module System Board Assembly (continued) System board assembly with system board and processor module System-board engine subassembly Main system board

System Error Messages

Diskette drive faulty. System board faulty. PC Card faulty, improperly seated, or improperly configured. System board faulty. System board faulty. System board faulty. System board faulty. Timer on system board malfunctioning. System board faulty. System board faulty. System board faulty. Timer circuit on system board malfunctioning. System board faulty.

Culmination Actually doing the deed

Dell Latitude D630c Bios Chip

This is roughly what the 24C02 chip will look like on your motherboard. The letters or precise arrangement or numbers letters may be different. But, you will be able to see (possibly with a magnifier) that on the top row, 24 and C02 are printed, possibly along with other letters or numbers, depending on the manufacturer, or series of the chip.

Replacing the Display Assembly

Carefully connect the LCD flex cable to the connector on the system board. The tab at the left of the clip should go under the palm rest, and the screw hole on the right side of the clip should line up with the holes in the connector ground strip and the threaded hole in the system board. 4. Reinstall the M2 x 9.5-mm screw that secures the LCD flex-cable hold-down clip to the system board.

Dell Latitude C840 Service Manual

System board The BIOS chip on the system board contains the service tag sequence, which is also visible on a bar code label on the bottom of the computer. The replacement kit for the system board includes a floppy disk or CD that provides a utility for transferring the service tag sequence to the replacement system board.

Audio Card and Audio Thermal Shield Removal

This procedure assumes that you have removed the system board from the plastic case and have removed the PC Card cage from the system board. To remove the audio card and audio thermal shield (see Figure 35), perform the following these steps 1. Gently pull the audio card off of connectors JP12 and JP13 on the system board. Do not rock the card to remove it, because this may damage the connectors.

Hard Disk Drive Assembly

NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. NOTICE To avoid damaging the system board, you must remove the battery before you service the computer. 9. Remove the M2 x 9.5-mm screw that secures the LCD flex-cable hold-down clip and the LCD flex-cable connector to the system board assembly (see Figure 8). The M2 x 9.5-mm screw also secures the left side of the modem retainer bracket to the system board assembly. 10. Carefully disconnect the LCD flex-cable connector from the system board. 2. Carefully connect the LCD flex cable to the connector on the system board. The tab at the left of the clip should go under the palm rest, and the screw hole on the right side of the clip should line up with the holes in the connector ground strip and the threaded hole in the system board. 4. Reinstall the M2 x 9.5-mm screw that...

System Board Assembly Components

System Board Assembly in the Bottom Case Assembly To remove a part of the system board assembly, Dell recommends that you first remove the assembly as described in System Board Assembly in Chapter 4. Then follow the instructions described in the following subsections to remove parts of the system board assembly.

Controlling Computer Power

The power button does not directly control power to the computer. Instead, when you slide the power button toward the front of the computer and then release it, the button momentarily closes the power switch on the system board. The power switch sends a signal to the power management controller, signaling the controller to initiate a change of state of the computer's power. The resulting power state depends on the present power state. The following subsection gives a description of the power states.

A Caution Before performing any of the procedures listed below read and follow the safety instructions in the System

Remove the screw securing the modem to the system board, and set it aside. b. Pull straight up on the attached pull-tab to lift the modem out of its connector on the system board, and disconnect the modem cable. system board connector 11. Align the modem with the screw hole and press the modem into the connector on the system board. 12. Install the screw to secure the modem to the system board.

Change the Serial Port and Parallel Port Mode options to the appropriate settings and then reboot the system

The Serial Ports device group and the Parallel Ports device group check the basic functions of the system board's I O port logic. Also, if a parallel printer is connected to the parallel port, the Parallel Ports device group tests the communication link between the system board's I O port logic and the printer.

Thermal Shield and Internal Modem Removal

The thermal shield (see Figure 18) serves as a heat shield for the system board, as well as an electromagnetic interference (EMI) fence for the processor board. 1. Gently pull the modem card off of connector JP19 on the system board. Do not rock the card to remove it, because this may damage the connectors. 2. Disconnect the fan cable from connector JP17 on the system board. 2. Disconnect the fan cable from connector JP17 on the system board. When reinstalling the heat exchanger fan, be sure to reconnect the fan cable to connector JP17 on the system board if you have an internal modem, there is an identical connector (JP2) next to JP17 The modem connector is color-coded red.

Replacing the Palm Rest

To aid with proper flex cable connection, a blue locator line has been added near the end of the palm-rest flex cable. When replacing the palm-rest flex cable, press the cable into the connector until the blue line aligns with the system board and hold it steady while you snap the ZIF connector down. (The blue line may reappear after the connector is closed, which should not indicate a problem with the connection.)

Step Two Taking it apart continued

The first thing that needs to be done when removing the screen is to disconnect this ribbon cable from its connector on the motherboard by pulling it upwards. This is the only electronic connection that the screen has with the rest of the notebook. The motherboard is the next part to be removed. This model has 2 screws fastening the motherboard to the case as shown in the picture. There are 2 more photos following, which show close-ups of each screw to avoid any confusion. They are shown by red arrows in the photographs. But, unlike previous screws, they do not have a convenient circled letter next to them. * For this model, these are the only screws that need to be removed on the motherboard There are other screws which may look as though they need to be removed, such as the ones by the processor or fan but these should not be removed. Applying a steady gentle lifting force under the middle fore section of the motherboard causes it to swing up.

Installing the Keyboard

Q NOTICE To avoid damage to the connector pins, press the keyboard connector evenly into the interface connector on the system board, and do not reverse the keyboard connector. 1. Connect the keyboard connector of the replacement keyboard to the interface connector on the system board. 9. Pull straight up on the pull-tab that is attached to the display-feed flex cable to disconnect the cable from the system board. system board by peeling up the pull-tab and pulling the tab down and away from the inverter connector.

Microprocessor Module

Dell Latitude Cpt

NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. When you reinstall the microprocessor module in the system board, make sure that you align the microprocessor connector on the left side of the board and press down firmly on the metal plate that is directly over the connector. When the microprocessor module is seated, all four corners must be at the same height. If one or more corners of the module are higher than the others, the module is not seated correctly. NOTICE To avoid damaging the system board, the power cable, battery, and second battery (if installed) must be removed before you service the computer. 5. Disconnect the LCD flex cable from the connector on the system board by pulling the connector straight up.

JV Caution Before performing the following procedures read the safety instructions in your System Information Guide

Remove the M2 x 5-mm screw securing the modem to the system board, and set it aside. b. Pull straight up on the attached pull-tab to lift the modem out of its connector on the system board, and disconnect the modem cable. 5. Align the modem with the screw hole, and press the modem into the connector on the system board. 6. Install the screw to secure the modem to the system board.

Thermal Shield and Internal Modem

The thermal shield serves as a heat shield for the system board, as well as an EMI fence for the processor board. 2. If your computer has an internal modem, disconnect the modem flex cable (see Figure 4-23) from connector JP20 on the system board and disconnect the twisted wire pair from connector JP2 on the RJ-11 card. Bend the cables back over the palmrest assembly to move them out of the way of the thermal shield.

Removing the Display Assembly

Remove the M2 x 9.5-mm screw that secures the LCD flex-cable hold- down clip and the LCD flex-cable connector to the system board assembly. The M2 x 9.5-mm screw also secures the left side of the modem retainer bracket to the system board assembly. 10. Carefully disconnect the LCD flex-cable connector from the system board.

Installing the Microprocessor Module

Align the pin-1 corner of the microprocessor module so that it points to the triangle on the system board, and insert the microprocessor module into the ZIF socket. 2. Tighten the ZIF socket by turning the cam screw clockwise to secure the microprocessor module to the system board.

JV Caution Before you begin any of the procedures in this section follow the safety instructions in the System

Remove the three M2 x 4-mm screws that secure the system board to the bottom case. Xa NOTE Each system board screw has an arrow beside it. system board 12. Disconnect the left and right speakers from their system board connectors. 13. Disconnect the reserve battery connector from the system board connector. 14. Disconnect the Bluetooth cable from the system board, if a Bluetooth device is present. 15. Lift the ZIF connector, and remove the status light (LED) cable from its ZIF connector on the system board. 16. Lift the system board up, from the right side, and out of the bottom case.

Replacing the Microprocessor Module

Align the pin-1 corner of the microprocessor module with the pin-1 corner of the microprocessor socket on the system board and insert the microprocessor module. 2. Tighten the ZIF socket by turning the cam screw clockwise to secure the microprocessor module to the system board assembly.

Reserve Battery Removal

Reserve battery connector on system board 5. Disconnect the reserve battery cable from the system board connector. 6. Pry the reserve battery free from the system board. The reserve battery is attached to the system board with a piece of adhesive tape. 7. Remove any remnants of the adhesive tape from the system board.

Caution Before you begin any of the procedures in this section follow the safety instructions in the

NOTICE To avoid damaging the system board, you must remove the main battery before you begin working inside the computer. a Remove the screw securing the modem to the system board, and set it aside. b Pull straight up on the attached pull-tab to lift the modem out of its connector on the system board, and disconnect the modem cable. b Align the modem with the screw holes and press the modem into the connector on the system board. c Replace the screw that secures the modem to the system board.

Keyboard KeypadMouse Connector Shield

Two tabs on the keyboard keypad mouse connector shield engage two associated slots on the I O panel near the keyboard keypad mouse connector. Retaining screw D4 attaches the bottom of the shield to the bottom of the I O panel. To remove the shield, remove retaining screw D4, rotate the bottom of the shield toward the back of the system board assembly, and lift the shield off the I O panel. 1. Disconnect one end of the I O interface cable from connector JSTDIO on the system board. Connector JSTDIO is located on the underside of the system board. See System Board Assembly in Chapter 4. 4. Remove the I O bracket from the system board.

Replacing the Palm Rest Assembly

Connect the touch pad flex cable to the ZIF connector on the system board. 5. Connect the status lights flex cable to the ZIF connector on the system board. System board assembly Main battery release latch 3. Peel the reserve battery away from the foam pad on the system board. The reserve battery is located between the memory module and the PC Card bay, and it is attached to the system board with an adhesive foam pad. 4. Disconnect the reserve battery cable from the connector on the system board.

Processor Board and Memory Module

1 Remove the three 5-mm screws securing the processor board to the system board. 2. Gently pull the processor board off of connector JP15 on the system board. Do not rock the board to remove it, because this may damage the connectors. When reinstalling the SODIMM heat sink, be careful to align the hole in the SODIMM heat sink over the metal clip soldered to the system board. When reinstalling the processor board, align the board with the notch on the system board connector. Press down on the left side of the board over the system board connector. This is the best spot to apply pressure to seat the processor correctly on connector JP15.

Product Information Guide

Computer Cable Routing

NOTICE To avoid damaging the system board, you must remove the main battery before you begin working inside the computer. When you replace the display, ensure that the ribbon tape around the display cable is securely tucked underneath the tabs. Insert the antenna wires through the hinge cover opening and then through the hole in the system board. Ensure that the antenna wires are not twisted and that they are securely attached to the Mini PCI card.

Main Battery Insulator

The main battery insulator insulates the main battery from the system board assembly. To remove the main battery insulator, lift it off the main battery compartment. NOTE The main battery insulator sometimes comes out as part of the system board assembly If this happens, follow the instructions in System Board Assembly in Chapter 4.

Module Latch Assemblies

CAUTION To avoid damaging the system board, you must remove the main battery before you service the computer. System Board Assembly The system board's basic input output system (BIOS) chip contains the system service tag number, which is also visible on a bar-code label on the bottom of the computer. The replacement kit for the system board assembly includes a diskette that provides a utility for transferring the service tag number to the replacement system board assembly. CAUTION To avoid damaging the system board, you must remove the main battery before you service the computer. 11. Remove the following two screws from the system board assembly (see Figure 18) NOTE Locate these screws by looking for the white circles on the system board that outline the captive washers. 12. Lift the system board assembly out of the bottom case assembly. Be sure to transfer the memory module(s) to the replacement system board assembly. After replacing the system board assembly be sure to enter the...

Audio Card and Audio Thermal Shield

This procedure assumes that you have removed the system board from the plastic case and have removed the PC Card cage from the system board. To remove the audio card and audio thermal shield, follow these steps (see Figure 4-44) 1. Gently pull the audio card off of connectors JP12 and JP13 on the system board. Do not rock the card to remove it, because this may damage the connectors.

Replacing the Audio Board

The audio board can be easily misaligned. When replacing it, first align the two screw holes in the board with the holes in the bosses. Then, as you press the audio board into the connector, sight sideways between the audio board and the system board to ensure that all pins on the audio board connector are headed correctly into the system board connector. System Board J Removing the System Board Replacing the System Board Removing the System Board The system board's BIOS chip contains the service tag sequence, which is also visible on a barcode label on the bottom of the computer. The replacement kit for the system board may include a CD that provides a utility for transferring the service tag sequence to the replacement system board. System Board Removal System Board Removal 15. Disconnect the reserve battery cable from the system board. 16. Remove the M2 x 4-mm screw that secures the right front corner of the system board. 17. Disengage the system board from the back panel....

Removing Field Replaceable Parts and Assemblies

System board assembly system board assembly NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. NOTICE To avoid damaging the system board, you must remove the battery before you service the computer. Remove the M2 x 8.5-mm screw that secures the LCD flex-cable hold-down clip and the LCD flex-cable connector to the system board assembly (see Figure 8). The M2 x 8.5-mm screw also secures the left side of the modem retainer bracket to the system board assembly. 10. Carefully disconnect the LCD flex-cable connector from the system board. 2. Carefully connect the LCD flex cable to the connector on the system board. The tab at the left of the clip should go under the palm rest, and the screw hole on the right side of the clip should line up with the holes in the connector ground strip and the threaded hole in the system board....

Post Beep Codes

If the display cannot display error messages during the POST, the computer may emit a series of beeps that identifies the problem or that can help you identify a faulty component or assembly. The following table lists the beep codes that may be generated during POST. Most beep codes indicate a fatal error that requires replacement of the system board or other corrective actions before the computer can operate. BIOS corrupted system board faulty BIOS corrupted system board faulty System board faulty System board faulty System board faulty Memory module improperly seated or system memory controller faulty (system board faulty) System board faulty System board faulty Keyboard assembly faulty or system board faulty System board faulty System board faulty Memory module improperly seated or system memory controller faulty (system board faulty) System board faulty Reserve battery faulty or system board faulty System board faulty System board faulty System board faulty 5-1-1 System power-...

Keyboard Assembly

NOTICE To avoid damaging the system board, you must remove the 9. Disconnect the keyboard cable from the connector on the system board. The keyboard cable is the wide, flexible cable. 3. Connect the keyboard cable to the connector on the system board. NOTICE Position the track stick and keyboard cables so they are not twisted when you reconnect them to the system board. NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer.

Palmrest Assembly

Disconnect the touch-pad cable from ZIF connector JP2 on the system board. NOTE When replacing the palmrest, ensure that the vertical tab at the back of the palmrest fits on the outside of the system board assembly, near the parallel port connector Also, check that the microphone boot is properly located in its slot on the top EMI shield and is fitted within the palmrest assembly.

Tilt Support Foot

Disconnect the display-assembly interface cable from connector JLCD on the system board. To disconnect the cable, grasp the pull tab and pull it straight up from the system board. The display-assembly interface cable connects the system board, LCD panel, LCD inverter board, and LED board. The cable wraps around a bobbin. To remove the display-assembly interface cable, follow these steps

POST Error Codes

If the computer's display cannot display error messages during the POST, the numbers lock (Num Lock), the capitals lock (Caps Lock), and the Scroll Lock indicators display codes that identify the problem or help you identify a faulty component or assembly. The following table lists the error codes that may be generated during POST. Most error codes indicate a fatal error that requires replacement of the system board or other corrective actions before the computer can operate. BIOS corrupted system board faulty BIOS corrupted system board faulty System board faulty System board faulty System board faulty Memory module improperly seated or system memory controller faulty (system board faulty) System board faulty System board faulty Keyboard assembly faulty or system board faulty System board faulty System board faulty Memory module improperly seated or system memory controller faulty (system board faulty) System board faulty Reserve battery faulty or system board faulty System board...

System Flash Codes

Run the System Board Devices tests in the Dell 1-1-4 ROM BIOS checksum failure. Run the System Board Devices tests in the Dell Run the System Board Devices tests in the Dell Diagnostics. For instructions, see Running the Dell Diagnostics in Chapter 3. If the program does not load, call Dell for technical assistance. For instructions, see Chapter 5, Getting Help 1-2-2 DMA initialization failure. Run the System Board Devices tests in the Dell Run the System Board Devices tests in the Dell Diagnostics. For instructions, see Running the Dell Diagnostics in Chapter 3. If the program does not load, call Dell for technical assistance. For instructions, see Chapter 5, Getting Help . Make sure that a memory module is installed in one of the memory module sockets on the system board. The computer will not function unless at least one memory module is installed. For instructions, see Installing Memory Modules in Chapter 2. 3-1-1 Slave DMA register failure. Run the...

Display Assembly

Remove the two M2 x 3-mm screws that secure the EMI shield bracket to the system board assembly. connector on the system board. 8. Pull straight up on the display-feed flex cable connector to disconnect the connector from the system board (see Display Assembly). QJ NOTICE When reconnecting the display-feed flex cable connector to the system board, push down on the top left and right ends of the connector (see Reconnecting the Display-Feed Flex Cable Connector). Pressing on the center of the connector may damage resistors and compromise EMI protection in the system.

PC Card Cage Removal

System board This procedure assumes that you have removed the system board from the plastic case. To remove the PC Card cage (see Figure 34), perform the following steps 3. Remove the four 18-mm screws securing the PC Card cage to the system board. Use a support for the system board to prevent the board from flexing when the card cage screws are removed. 4. Gently pull the card cage off of connector UP9 on the system board. Do not rock the cage to remove it, because this may damage the connectors.

Memory Module Cover

NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. Memory modules are keyed, or designed to fit into their sockets, in only one direction. The slots on the system board are notched so that the memory module can be firmly seated only one way.

Memory Modules

CAUTION To avoid damaging the system board, you must remove If you only have one memory module, install it in the DIMM A socket. Memory modules are keyed, or designed to fit into their sockets in only one direction. The slots on the system board are notched so that the memory module can be firmly seated only one way.

RJ11 Card Removal

Remove the 4-mm screw securing the RJ-11 card to the system board. 2. Lift the card off the system board. Figure 34. System Board Components 2 System board This procedure assumes that you have removed the PC Card heat sink and hinge saddles. To remove the system board (see Figure 33), perform the following steps 2. Remove the system board from the bottom case.

Message Cause Action

Run the System Board Devices device group in the Dell Diagnostics. (See Running the Dell Diagnostics found later in this chapter for instructions.) If the program does not load, call Dell for technical assistance. (For instructions, see Chapter 5, Getting Help.) Run the System Board Devices device group in the Dell Diagnostics. (See Running the Dell Diagnostics found later in this chapter for instructions.) If the program does not load, call Dell for technical assistance. (For instructions, see Chapter 5, Getting Help.)

Display

Dell Inspiron Function Keys List

Remove the two M2 x 3-mm screws that secure the display-feed flex cable to the system board. (J) NOTICE When reconnecting the display-feed flex cable connector to the system board, push down on the top-left and top-right ends of the connector. Pressing on the center of the connector may damage resistors and compromise EMI protection in the computer. 9. Pull up on the pull-tab that is attached to the display-feed flex cable connector to remove the tab from the interface connector on the system board.

Memory Module

Xa HINT This procedure covers removing and replacing the memory module located under the memory module modem cover on the bottom of the computer. A second memory module resides on the upper surface of the system board under the EMI shield. To replace the memory module under the EMI shield, perform the procedure for removing the EMI shield. Then replace the memory module.

Modem Assembly

The modem (if present) must be removed before the main system board can be removed (see Figure 21). NOTICE To avoid damaging the system board, you must remove the main battery before you service the computer. 2. Carefully align and press the modem into the system board connector.

Keyboard

O NOTICE To help prevent damage to the system board, you must remove the battery from the battery bay before you begin working inside the computer. c To release the keyboard cable from the keyboard connector on the system board, rotate the plastic bar on the keyboard connector to the front of the computer.

Wireless Mini Card

NOTICE To help prevent damage to the system board, you must remove the battery from the battery bay before you begin working inside the computer. c Lift the Mini-Card out of its system board connector. NOTICE The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors on the card and on the system board, and realign the card. a Insert the Mini-Card connector into the system board connector at a 45-degree angle, and then press the other end of the Mini-Card down into the securing tabs until the card clicks into place. 1 system board connector 2 antenna cables (2) 3 antenna cable connectors (2) 1 system board connector 2 antenna cables (2) 3 antenna cable connectors (2)

PC Card Cage

This procedure assumes that you have removed the system board from the plastic case. To remove the PC Card cage, follow these steps (see Figure 4-43) 3. Remove the four 18-mm screws securing the PC Card cage to the system board. Use a support for the system board to prevent the board from flexing when the card cage screws are removed. 4. Gently pull the card cage off of connector UP9 on the system board. Do not rock the cage to remove it, because this may damage the connectors.

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