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Basic Troubleshooting 2-5
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A simple visual inspection of a computer’s interior hardware can often lead to
the source of a problem, such as a loose expansion card, cable connector, or
mounting screw. When you perform the visual inspection, refer to “System
Features” in Chapter 1 to locate components in the inspection procedure.
To perform the internal visual inspection, follow these steps:
1. Turn off the system, including any attached peripherals, and disconnect
the AC power cable from its power source.
2. Open the computer’s right and left panel doors as described in “Accessing
the Interior of the System” in Chapter 1.
3. Verify that the chips, DIMMs, expansion cards, and single-edge contact
(SEC) cartridge and heat sink assemblies are fully seated in their sockets
or connectors.
To ensure that the chips are fully seated in their sockets, press firmly on
the top of each chip.
To reseat SEC cartridge and heat sink assemblies, remove and reinstall
them as described in “SEC Cartridge and Heat Sink Assembly” in
Chapter 4.
To reseat a DIMM, remove it from its socket and reinstall it as described in
“DIMMs” in Chapter 4.
If you need to reseat an expansion card, remove the card as described in
“Expansion Cards” in Chapter 4, and then reinsert the card in its connec-
tor, and carefully push it in until fully seated.
4. Verify that all jumpers are set correctly.
For information about these jumpers, see “System Board Jumpers”
in Chapter 1.