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Undetermined Problems
You are here because the diagnostic tests did not identify
the failure, there is no Devices List, or the system is
inoperative.
Note: If you suspect a software mismatch is causing
failures (solid or intermittent), be sure to see
“Software/Hardware Mismatch Problems” on
page 133.
Check the power supply voltages. See “Power Supply” on
page 80. If the voltages are not correct, replace the
power supply. If the voltages are correct, return here and
do the following:
1. Power-off the computer.
2. Remove or disconnect the following (one at a time)
until you find the failure (power-on the computer and
reconfigure each time).
Any external devices
Surge suppressor device (on the computer)
Modem, printer, mouse, or non-IBM devices
Each adapter
Drives
Memory-Module Kits
Note
Minimum operating requirements for the PC
Server 325, Type 8639 are:
System board
Processor board with:
–
Processor
–
1 memory DIMM
Cooling fan
3. Power-on the computer. If the problem remains,
suspect the system board, then the processor board
in that order.
Note
If the problem goes away when you remove an
adapter, and replacing that adapter does not correct
the problem, suspect the system board or processor
board.
Related Service Information
135
Summary of Contents for 325 8639
Page 97: ...Drawer Model Rails Drives 92 PC Server HMM ...
Page 102: ...Operator Panel and Cable Note Loosen do not remove screw Screw PC Server 325 Type 8639 97 ...
Page 108: ...System Board Note Note A black square indicates pin 1 PC Server 325 Type 8639 103 ...
Page 120: ...Parts Listings 1 2 3 4 5 6 7 8 9 10 12 11 13 14 15 16 17 18 20 19 PC Server 325 Type 8639 115 ...
Page 121: ...21 23 24 25 22 26 27 28 29 30 116 PC Server HMM ...
Page 129: ...124 PC Server HMM ...
Page 145: ...IBM Part Number 84H3049 Printed in U S A S84H 3ð49 ðð ...