Observing the Boot Routine

After you perform a visual inspection as described in the previous section, boot the computer from a diagnostics diskette and, while the boot routine is running, observe the computer for any indications of problems.

NOTE: To prevent possible damage to the original diagnostics diskette, always use a backup copy ofthe diagnostics diskette when servicing a user s computer Dell recommends that users make copies ofthe Dell diagnostics diskette. For instructions, see "Before You Start Testing" in Chapter 4 ofthe Reference and Troubleshooting Guide.

To observe the boot routine, follow these steps:

1. Turn off the computer and any attached peripherals.

2. Insert a diagnostics diskette into the diskette drive. Turn on all peripherals and then the computer.

3. Watch the indicators on the top of the keyboard. After all three indicators flash momentarily, the Num Lock indicator should light up and remain on.

Do these indicators light up within approximately 10 seconds after the boot routine starts?

Yes. Proceed to step 4.

No. Troubleshoot the power subsystem.

4. While the boot routine is running, observe the computer for any of the following:

• Diskette-drive and hard-disk drive access indicators — These indicators light in response to data being transferred to or from the drives. If either of these indicators fail to light during the boot routine, troubleshoot the diskette-drive or hard-disk drive subsystem, as appropriate.

• Beep codes — A beep code is a series of beeps that indicates an error condition. If the computer emits a beep code, go to Table 3-1.

NOTE: The computer beeps once during the boot routine. This single beep is normal and is not a beep code.

• System error messages — These messages can indicate problems or provide status information. If a system error message displays, go to Table 3-2.

5. Observe the display for the Diagnostics Menu.

Does the Diagnostics Menu display?

Yes. See "Running the Dell Diagnostics" in Chapter 3.

No. Proceed to step 6.

6. Insert another copy of the diagnostics diskette into the diskette drive, and reboot the computer.

Does the Diagnostics Menu display?

Yes. See "Running the Dell Diagnostics" in Chapter 3.

No. Proceed to the next section, "Eliminating Resource Conflicts."

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