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Note: See "System" on page 100 to determine which components should be replaced by a field service technician.
Symptom
The server does not turn on.
The server does not turn off.
Note: See "System" on page 100 to determine which components should be replaced by a field service technician.
Symptom
The number of serial ports
identified by the operating
system is less than the number
of serial ports installed.
A serial device does not work.
Power problems
FRU/action
1. Verify that:
v The power cables are properly connected to the server.
v The electrical outlet functions properly.
v The type of memory installed is correct.
v If you just installed an option, remove it, and restart the server. If the server
now turns on, you might have installed more options than the power supply
supports.
2. If LEDs for microprocessors or VRMs are on, verify that:
a. A VRM is installed if a second microprocessor is present.
b. All microprocessors have the same speed.
3. Override front panel power button:
a. Disconnect server power cords.
b. Install a jumper on the force power-on jumper (JPWR1).
c. Reconnect power cords.
If server turns on:
a. Service processor (baseboard management controller) error.
b. Operator information card.
If server does not turn on:
v System board
4. See "Undetermined problems" on page 97.
1. Verify whether you are using an ACPI or non-ACPI operating system. If
you are using a non-ACPI operating system:
a. Press Ctrl+Alt+Delete.
b. Turn off the system by holding the power-control button for 4 seconds.
c. If server fails during BIOS POST and power-control button does not work,
remove the AC power cord.
2. If the problem remains or if you are using an ACPI-aware operating system,
suspect the system board.
Serial port problems
FRU/action
1. Verify that:
v Each port is assigned a unique address by the Configuration/Setup Utility
program and none of the serial ports is disabled.
v The serial-port adapter, if you installed one, is seated properly.
2. Failing serial port adapter.
1. Verify that:
v The device is compatible with the server.
v The serial port is enabled and is assigned a unique address.
v The device is connected to the correct port (see Chapter 5, "I/O connectors,"
on page 57).
2. Failing serial device.
3. Serial adapter, if installed.
4. System board.
Chapter 7. Symptom-to-FRU index
89
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