Eliminating Resource Conflicts - Dell Precision 400 Service Manual

3. Verify that all chips, DIMMs, and expansion cards are fully seated in
their sockets or connectors.
WARNING: The processor single-edge contact (SEC) cartridge/heat
sink assembly can get extremely hot. Be sure the assembly has had
sufficient time to cool before you touch it.
To ensure that the chips are fully seated in their sockets, press firmly on the
top of each chip.
To reseat the microprocessor, remove and reinstall it as described in
"Processor SEC Cartridge/Heat Sink Assembly" in Chapter 4 or Chapter 5.
To reseat a DIMM, remove it from its socket and reinstall it as described in
"DIMMs" in Chapter 4 or Chapter 5.
If you need to reseat an expansion card, use a
the screw that secures the card-mounting bracket. Grasp the card by its top
corners, and carefully pull it out of its connector. Reinsert the card in its
connector, and carefully push it in until it is fully seated. Then reinstall the
card-mounting bracket's retaining screw.
4. Verify that all jumpers are set correctly.
For information about these jumpers, see "System Board Jumpers" in Chap-
ter 1.
5. Check all cable connectors inside the computer to verify that they are
firmly attached to their appropriate connectors.
6. Reinstall the computer cover.
7. Reconnect the computer and any attached peripherals to their power
sources, and turn them on.
Does the problem appear to be resolved?
Yes. No further steps are necessary.
No. Proceed to "Eliminating Resource Conflicts," "Running the Dell Diag-
nostics," and "Getting Help" found later in this chapter.
E
liminating Resource Conflicts
Devices within or connected to the computer may require dedicated memory
spaces, interrupt levels, or DMA channels, all of which must be allocated during
installation of the devices. Because devices may be installed at different times,
it is possible that the same resource is assigned to two or more devices.
Resource conflicts can result in disorderly or erratic system operation or failure
of the system to operate at all. If you suspect that resource conflicts might exist,
check the system using the Windows 95 Device Manager or the ISA Configura-
tion Utility (ICU), and reassign the resources as necessary. See "Advanced
Expansion Subsystem" in Chapter 1 for information on the Device Manager and
the ICU. See "Interrupt Assignments" in Chapter 1 to help identify possible
-inch nut driver to remove
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Basic Troubleshooting 2-5