IBM IntelliStation A Pro 6224, Hardware Maintenance Manual And Troubleshooting Manual

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Undetermined problems
Use the information in this section if the diagnostic tests did not diagnose the
failure, the devices list is incorrect, or the computer is inoperative.
Notes:
1. Damaged data in CMOS memory can cause undetermined problems.
2. Damaged data in BIOS code can cause undetermined problems.
Check the LEDs on all the power supplies. If the LEDs indicate the power supplies
are working correctly, complete the following steps:
1. Turn off the computer.
2. Make sure that the computer is cabled correctly.
3. Remove or disconnect the following devices (one at a time) until you find the
failure (turn on the computer and reconfigure each time):
v
Any external devices
v
Surge suppressor device (on the computer)
v
Modem, printer, mouse, or non-IBM devices
v
Each adapter
v Drives
v Memory modules (minimum requirement = two 512 MB DIMM)
Note: Minimum operating requirements are:
a. Power supply
b. System board
c. One microprocessor
d. Memory (with a minimum of two 512 MB DIMM)
4. Turn on the computer. If the problem remains, suspect the following FRUs in the
order listed:
v
Power supply
v
System board
Notes:
1. If the problem goes away when you remove an adapter from the system and
replacing that adapter does not correct the problem, suspect the system board.
2. If you suspect a networking problem and all the system tests pass, suspect a
network cabling problem external to the system.
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IntelliStation A Pro Type 6224: Hardware Maintenance Manual and Troubleshooting Guide