Dell Precision 620 User Manual download pdf (Page 89)

 
3. Remove the AGP card brace according to the instructions in "Removing and Replacing the AGP Card Brace." 
 
4. Verify that each expansion card is firmly seated in its connector. If any expansion cards are loose, reseat them. 
 
5. Verify that any cables are firmly connected to their corresponding connectors on the expansion cards. If any cables appear loose, reconnect 
them.  
 
For instructions on which cables should be attached to specific connectors on an expansion card, see the expansion card's documentation. 
 
6. Remove all expansion cards except the video card. 
 
7. Replace the computer cover, reconnect the system to an electrical outlet, and turn it on. 
 
8. Insert the Dell Precision ResourceCD into the CD-ROM drive, reboot the system, and run the RAM test group in the Dell Diagnostics.
If the tests complete successfully, proceed to step 9. If any of the tests fail, see "Getting Help" for information on obtaining technical 
assistance. 
9. Turn off the system, disconnect it from the electrical outlet, and remove the computer cover. 
 
10. Reinstall one of the expansion cards that you removed previously, and repeat steps 6 and 7. 
 
If any of the tests fail, the expansion card you just reinstalled is faulty and needs to be replaced. If the tests complete successfully, repeat 
steps 8 and 9 with another expansion card.  
If you have replaced all the expansion cards removed previously and the expansion card problem is not resolved, see "Getting Help" for 
information on obtaining technical assistance. 
Troubleshooting System Memory 
A computer memory problem can be a faulty memory module or a faulty system board. If a random-access memory (RAM) error message 
appears, the computer probably has a memory problem. 
When you turn on or reboot the system, the Caps Lock and Scroll Lock indicators on the keyboard should flash momentarily and then turn off. If the 
Num Lock option in System Setup is set to On, the Num Lock indicator should flash momentarily and then remain on; otherwise, it should turn off. 
Abnormal operation of these indicators can result from a defective memory module. To troubleshoot system memory, perform the following steps: 
1. Turn on the system, including any attached peripherals.  
2. If an error message indicates invalid system configuration information, enter System Setup and check the System Memory option. If the 
amount of memory displayed does not match the amount of memory installed, turn off the computer, disconnect it from the electrical outlet, 
remove the computer cover, and reseat the memory modules in their sockets. 
 
3. Replace the computer cover, reconnect the system to an electrical outlet, and turn it on. 
 
4. If the problem is not resolved, insert the Dell Precision ResourceCD into the CD-ROM drive, reboot the system, and run the RAM test group 
in the Dell Diagnostics.  
If the Dell Diagnostics identifies a faulty memory module, replace that memory module. If the Dell Diagnostics determines that the system board is 
faulty, or if the Dell Diagnostics does not identify the cause of the problem and the problem is still not resolved, see "Getting Help" for instructions 
on obtaining technical assistance. 
Troubleshooting the Video Subsystem 
Troubleshooting video problems involves determining which of the following is the source of the problem: the monitor, the monitor interface cable, 
or the integrated video subsystem. 
Before attempting to troubleshoot the video subsystem, perform the procedure found in "Troubleshooting the Monitor" to determine whether or not 
the monitor is the source of the problem. 
If the monitor is not at fault, perform the following steps: 
NOTE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby 
power LED on the system board has turned off. For the location of this LED, see Figure 1 in "Installing System Board Options."
CAUTION: Before you remove the computer cover, see "Safety First—For You and Your Computer."
NOTE: Before disconnecting a peripheral from the system or removing a component from the system board, verify that the standby 
power LED on the system board has turned off. For the location of this LED, see Figure 1 in "Installing System Board Options."
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Dell Precision 620 User Manual Page 89

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