The chip (C24O4N) is located on the bottem of the laptop right next to the two DIMM slots. short the pins (3 and 7) IMMEDIATELY AFTER hitting the power button.
The chip on this model is located under the processor itself.
The only method I have been told of, (as I have not had a chance to work on one of these models myself) is by soldering or otherwise attaching 2 small wires (insulated or covered wires) to the leads / legs of the chip. Then running them out of the laptop where they can be connected after the laptop is turned on. And replacing the processor very carefully.
It is very important to make certain that the heat sink is properly attached to the processor before attempting to turn on the laptop. Also, processors are very sensitive to damage and static charges which can damage them. One must always be very careful when working with processors.
The chip is a C24O4N. short the pins (3 & 6 or 3 & 7) IMMEDIATELY AFTER hitting the power button.
This fix is for the Dell inspiron 6000
The Bios chip is underneth the Video Card so you will have to use the method I used with the video card removed during the repair. Shorting the pins wont will; (i tried), What i did was cut pin iS and as the Mote bock began to boot I held a small screwdriver to connect the circuit. Right after it powers up remove the screwdrive that was completing the circuit and at this point your bios password should be clear. What l did after that was l cut a tiny piece of solder and wedged it into where I cut the pin to complete the circuit. Then you need to reinstall the video card and power up the notebook to see if it cleared the bi&s password, if it didn't try again this fix WILL work!. if it did I recommend superglueing (lie piece of solder into place instead of actually trying to solder. Thats what I did arid my Notebook works PERFECT!
As you can see from the above picture, the Latitude L400 comes in a thin leather case. It is quite stylish, save for the fact that the Dell logo is emblazoned on the front and on the zipper pull tabs.
The L400 Also comes standard with a 20 GB Hard drive and 256 MB of RAM. And this one came with Windows 2000 Professional, as I found out once I removed the password.
But, enough about the way it could work, let's get on to how to get it working again if you are locked out of it by a password.
Taking the laptop out of the case reveals a slim machine with no floppy, no CD-ROM, and a single PCMCIA and USB port on the side. This laptop requires a docking station if you need access to normal Media.
That's the 4 parts of my Targus Universal Adapter on the table above the laptop.
A password screen locks us out of the laptop. But not to be defeated, we just get out our tools.
This laptop is rather easy, and only requires the removal of 4 screws, and doesn't even need a paperclip. This one can be cleared by removing power to the CMOS or BIOS chip.
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 first thing that needs to be removed is the battery. This will ensure that no power from the laptop battery gets to the CMOS and holds the passwords in there. The latch is pulled to the side, and the battery is flipped up and out.
This slide plate just above the keyboard needs to be pushed towards the left. It may help to lift up on the right side slightly while pushing it to the left. It slides about % of an inch to the left and then can be pulled off.
Now, removing the slide plate reveals the 4 screws that hold the keyboard in place. (The red arrows indicate which screws are the ones that need to be taken out.)
The Keyboard needs to be lifted from the front, and pulled towards the screen slightly.
It can then be flipped over as shown.
Now the single keyboard connector is removed and the keyboard is pulled off the unit. This connector is one of the ones that can be taken off and replaced easily.
Here you can see the actual BIOS chip itself (yellow arrow), and the CMOS battery (blue arrow) that we need to remove.
The CMOS Battery powers the CMOS/BIOS chip, giving it power to hold the settings and passwords and such while the laptop has no power.
The CMOS battery is held onto the motherboard by a sticky glue.
A flat tipped screwdriver or other prying device is used to gently pry it upwards until it is loose.
Finally the CMOS battery plug is pulled loose from its connector socket on the motherboard.
The pernicious CMOS battery is held victoriously. This is it. The final, last part of clearing this laptop.
After waiting about five minutes, it can be replaced and everything put back in place. The password is now cleared.
When the laptop is put back together, it is important to slide this corner of the keyboard in just right.
This procedure will clear the supervisor password, the user password, the boot password, and will reset the hard drive password from 'locked' to 'set'; but it will not clear the hard drive password. I do not know if it is possible to clear the hard drive password, perhaps that is what the 24C02 chip on this laptop is for.
I did say that I had taken this laptop completely apart.
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.
And yes, it can be hooked up without the bottom of the casing and powered on as in the main site procedure.
Some unnecessary information about the chip.
This page is dedicated to somewhat trivial information about the 24C02 non-volatile RAM chip that is used to store the passwords and tags which was the focus of this site.
It will also serve to provide more information about why this particular chip was used, debunk the claims of money-grubbing Hoodwinkers selling replacement chips for around ten times what they pay for them, and offer options to the souls who have de-soldered or damaged their chips and not yet bought one of these replacements, or received one which was damaged in transit (according to the shipper.)
The <B24C02< b>microchip is a small microchip that can store up to 2048 Bits, or 256 Bytes of data. This data can be read and written by a computer (or by another part of an electronic circuit.) In actual practice is mostly read from, instead of written to. It uses a serial communication protocol bus called I2C, which if you haven't heard of it, is a fairly common way for components inside the computer's circuitry to exchange information. You can read all about it, if you want to:
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