3.Turn off the system, including any attached peripherals, and disconnect all the AC power cables from their power sources.
4.Remove the left computer cover.
See “Removing the Computer Covers” earlier in this chapter.
CAUTION: See “Protecting Against Electro- static Discharge” in the safety instructions at the front of this guide.
5.Remove the support panel.
Remove the two screws from the support panel and pull the back edge tabs on the panel out of the slots in the chassis.
6.Remove the memory module.
Hold the module by the corners where the handles are and carefully pull the module out until the edge connectors are free from the system board connector.
NOTE: Be careful not to touch components or gold edge connectors on the module.
7.Reseat the SIMMs in their sockets.
See “Adding Memory” in Chapter 8 for instructions on removing and replacing SIMMs.
8.Replace the memory module.
Hold the module by the corners with the SIMM sockets facing down. Ease the module into the cor- rect slot guides until it is touching the system board connector. Press the module carefully but firmly into the system board connector and rotate the handles closed.
9.Replace the support panel.
Align the panel so that the two tabs are to the left. Fit the tabs into the two slots on the chassis back and swing the panel closed. Replace the two screws removed in step 5.
NOTE: Be sure the microprocessor module(s) and memory module fit between the tabs and cover.
10.Replace the computer cover, reconnect the system to AC power, and turn it on.
11.Enter the system configuration utility and check the Extended Memory category and add 1024 KB to the total shown.
Does the amount of memory installed match the Extended Memory setting plus 1024 KB?
Yes. Continue to step 12. No. Go to step 13.
12.Reboot the system, and observe the monitor screen and the Num Lock, Caps Lock, and Scroll Lock indicators on the keyboard.
Does the monitor screen remain blank, and do the Num Lock, Caps Lock, and Scroll Lock indicators on the keyboard remain on?
Yes. Continue to step 13. No. Go to step 15.
13.Turn off the system, disconnect it from AC power, and remove the left computer cover.
14.If possible, swap each SIMM (starting with socket J1) with one of the same capacity, reboot the sys- tem, and observe the monitor screen and the indicators on the keyboard.
Is the problem resolved?
Yes. You have fixed the problem. No. Continue to step 15.
15.Run the RAM Test Group in the system diagnostics.
See Chapter 5, “Running the System Diagnostics.” Do the tests complete successfully?
Yes. You have fixed the problem.
No. See Chapter 11, “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, the video memory, or the video logic of the computer. You can also have a