IBM 8646 - Eserver xSeries 220 Hardware Maintenance Manual page 114

1. Power-off the computer.
2. Recover BIOS
3. Be sure the system is cabled correctly.
4. Remove or disconnect the following (one at a time) until you find the failure
Note: Minimum operating requirements are:
5. Power-on the computer. If the problem remains, suspect the following FRUs in
Notes:
1. If the problem goes away when you remove an adapter from the system, and
2. If you suspect a networking problem and all the system tests pass, suspect a
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Hardware Maintenance Manual: xSeries 220 Type 8646
(power-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 = one 128 MB DIMM)
a. 1 Power Supply
b. System Board
c. 1 Microprocessor
d. 1 Terminator Card in Slot 2
e. 1 Memory Module (minimum of 1 DIMM in slot labeled DIMM 1)
the order listed:
Power Supply
System Board
replacing that adapter does not correct the problem, suspect the system board,
then the power supply.
network cabling problem external to the system.