Dell OptiPlex N Service Manual (.pdf) - Page 27
Observing the Boot Routine, Watch the Num Lock, Caps Lock, and Scroll Lock indicators on - series
![]() |
View all Dell OptiPlex N manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 27 highlights
Observing the Boot Routine After you perform an external visual inspection as described in the previous section, you should boot the computer and, while the boot routine is running, observe the computer for any indications of problems. NOTE: Most of the steps in this procedure require observation of computer functions and indications, some of which can occur simultaneously. It may be necessary to reboot the computer several times in order to complete all of these steps. To observe problem indications during the boot routine, follow these steps: 1. Turn on all peripherals and the computer. If the computer is already on, press to reboot the computer. 2. Check the power supply fan. Does the fan run normally? Yes. Proceed to step 3. No. Troubleshoot the computer 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 computer power supply. If the troubleshooting procedure indicates that the computer power supply is operational, troubleshoot the memory subsystem. 4. During the boot routine, observe the computer for any of the following: • Hard-disk drive access indicator - This indicator lights up in response to data being transferred to or from the drive. If this indicator fails to light up during the boot routine, troubleshoot the hard-disk drive subsystem. • Beep codes - A beep code is a series of beeps that indicates an error condition. If the computer emits a beep code, see Table 3-1. • System error messages - These messages can indicate problems or pro- vide status information. If a system error message is displayed, see Table 3-2. If none of these indications is noted, proceed to the next section, "ServerBased Diagnostics." Basic Troubleshooting 2-3
![](/manual_guide/products/dell-optiplex-n-service-manual-pdf-c2840ec/27.png)