Dell OptiPlex NX1 - Manual (Page 55)

Basic Troubleshooting 2-3
Does the inspection reveal any problems?
Yes. Refer to the parts removal and replacement procedure in Chapters 4,
5, 6, or 7, as appropriate for your system.
No. Proceed to the next section, “Observing the Boot Routine.”
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After you have performed an external visual inspection as described in the
previous section, you should boot the system and, while the boot routine is
running, observe the system for any indications of problems.
NOTE: Most of the steps in this procedure require observation of system
functions and indications, some of which can occur simultaneously. It may be
necessary to reboot the system several times in order to complete all of these
steps.
To observe problem indications during the boot routine, follow these steps:
1. Insert a copy of the Dell Diagnostics Diskette into drive A. Turn on all
peripherals and the computer. If the computer is already on, press the
reset button or <Ctrl
>< Alt >< Del> to reboot the system.
2. Check the power supply fan.
Does the fan run normally?
Yes. Proceed to step 3.
No. Troubleshoot the system power supply.
3. Watch the Num Lock, Caps Lock, and Scroll Lock indicators on the upper-
right corner of the keyboard. After all three indicators flash momentarily,
the Num Lock indicator should light up and remain on.
Do these indicators flash on and off within approximately 10 seconds after
the boot routine starts?
Yes. Proceed to step 4.
No. Troubleshoot the system power supply. If the troubleshooting pro-
cedure indicates that the system power supply is operational, troubleshoot
the system board.
4. During the boot routine, observe the system for any of the following:
‡
Diskette-drive and hard-disk drive access indicators: These indicators
light up in response to data being transferred to or from the drives. If
either of these indicators fails to light up during the boot routine,
troubleshoot the diskette drive or hard-disk drive subsystem, as
appropriate.