Dell PowerEdge 1500SC User Manual download pdf (Page 28)

If the monitor screen does not remain blank, and the Num Lock, Caps Lock, and Scroll Lock indicators on the keyboard remain on, continue to step 18. 
12. Swap the memory module pair in PAIR 1 with a pair of the same capacity.  
 
13. Install the memory modules cooling shroud (see "Cooling Shrouds" in "Installing System Board Options").  
 
14. Replace the system's right-side cover and reconnect the system to an electrical outlet.  
 
15. Reboot the system, and observe the monitor screen and the indicators on the keyboard.  
 
16. If the problem still exists:  
 
a. Turn off the system.  
 
b. Remove the right-side cover.  
 
c. Remove the memory modules cooling shroud.  
 
d. Repeat steps 12 through 15 for the pair of memory modules installed in PAIR2.  
 
If the problem is not resolved, see "Getting Help," for instructions on obtaining technical assistance. 
17. Run the system memory test in system diagnostics.  
 
If the test does not complete successfully, see "Getting Help," for instructions on obtaining technical assistance. 
Troubleshooting the Video Subsystem 
Problem 
l Monitor not operating  
 
l Monitor interface cable not connected correctly or is faulty  
 
l Video logic problems  
 
Action 
1. Check the system and power connections to the monitor.  
 
2. Run the video tests in system diagnostics.  
 
If the tests run successfully, the problem is not related to video hardware. See "Finding Software Solutions." 
If the tests did not run successfully see "Getting Help," for instructions on obtaining technical assistance. 
Troubleshooting the System Board 
Problem 
l Error message indicating a system board problem  
 
Action 
1. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.  
 
2. Remove the right-side cover (see "Removing the Side Covers").  
 
3. Remove all expansion cards except the SCSI host adapter card for the boot drive (see "Removing an Expansion Card" in "Installing System Board 
Options").  
 
4. Replace the right-side cover (see "Replacing the Side Cover").  
 
5. Turn on the system including any attached peripherals.  
 
6. Run the Quick Tests in system diagnostics.  
 
If the tests does not run successfully, see "Getting Help," for instructions on obtaining technical assistance. 
7. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.  
 
8. Remove the right-side cover (see "Removing the Side Covers").  
 
9. Reinstall one of the expansion cards that you removed in step 3 (see "Installing an Expansion Card" in "Installing System Board Options").  
 
10. Replace the right-side cover (see "Replacing the Side Cover").  
 
11. Turn on the system including any attached peripherals.  
 
12. Run the Quick Tests again.  
 
NOTE: There are multiple configurations for the memory modules; see "Memory Module Installation Guidelines" in "Installing System Board Options." 
The following steps are an example of one configuration. 
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