IBM 6000R - Netfinity - 8682 Hardware Maintenance Manual page 199

3. Remove or disconnect the following (one at a time) until
you find the failure (power-on the computer and recon-
figure each time).
Any external devices
Surge suppressor device (on the computer)
Modem, printer, mouse, or non-IBM devices
Each adapter
Drives
Memory-Modules (Minimum requirement = 512
MB (4x128 MB DIMMs))
Note: Minimum operating requirements are:
4. Power-on the computer. If the problem remains, sus-
pect the following FRUs in the order listed:
Power Supply
Power Backplane
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.
a. 1 Power Supply
b. Power Backplane
c. System Board (with pins 2 and 3 on J23
connected together to bypass the power
switch; default is pins 1 and 2)
d. 1 Microprocessor
e. 1 Terminator Card in Slot 4
f. Memory Module (with a minimum of 1 bank
of 128 MB DIMMs (128x4))
Symptom-to-FRU index
187