Operation Manual

Note: See Chapter 7, “Parts listing, Types 8861, 8862,” on page 139 to determine which components are
replaceable by the customer and which components must be replaced by an IBM field service technician.
Power supply LEDs
Operator
information
panel LED Description FRU/action
AC
good
DC
good Fan
Off Off Off Off No power to system
or ac problem.
1. Check ac power to system.
2. Make sure power cord is plugged in to a
functioning power source.
3. Isolate by removing one power supply at a time.
On Off Off Off DC source power
problem
1. Make sure memory cassette is seated in
microprocessor tray assembly and that
microprocessor tray assembly is connected
to power backplane.
2. Isolate by removing one power supply at a time.
3. View service processor error logs through serial
connection of remote supervisor adapter.
On On Off Off Standby power
problem
1. View service processor error logs through
serial connection of remote supervisor
adapter.
2. If no 3.3vsby, replace power backplane.
3. If no 5vco, isolate by removing one power supply
at a time.
On On Off Blinking System power-on
problem
1. View service processor error logs through
serial connection of remote supervisor
adapter.
2. Press power button on operator information
panel.
3. Use force power-on jumper as debug aid (see
“Microprocessor board connectors, jumpers and
LEDs” on page 68) to eliminate operator
information panel switch and cable.
4. Remove service processor and attempt to turn on
the server.
On On On On Power supply fan
fault
v Replace power supply.
On On Off On Power is OK. N/A
Chapter 6. Symptom-to-FRU index 131