IBM xSeries 230 6RY Hardware Maintenance Manual page 152

Notes:
1. If you suspect a software mismatch is causing failures (solid or intermittent), be
2. A corrupt CMOS can cause undetermined problems.
Check the LEDs on all the power supplies, see"Power supply LED errors" on page
133. If the LEDs indicate the power supplies are working correctly, return here and
do the following:
1. Power-off the computer.
2. Be sure the system is cabled correctly.
3. Remove or disconnect the following (one at a time) until you find the failure
Note: Minimum operating requirements are:
4. Power-on the computer. If the problem remains, suspect the following FRUs in
Notes:
1.
2.
144
Hardware Maintenance Manual: xSeries 230 Models 6RY, 61Y
sure to see "Using the SCSISelect utility program" on page 37.
(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-Modules (Minimum requirement = 512 MB (4x128 MB DIMMs))
a. 1 Power Supply
b. Power Backplane
c. System Board
d. 1 Microprocessor and VRM
e. 3 Terminator Cards
f. Memory Module (with a minimum of 1 bank of 128 MB DIMMs)
the order listed:
Power Supply
Power Backplane
System Board
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.
If you suspect a networking problem and all the system tests pass, suspect a
network cabling problem external to the system.