Keyboard
Note
If a mouse or other pointing device is attached,
remove it to see if the error symptom goes away. If
the symptom goes away, the mouse or pointing device
is defective.
001
– Power-off the computer.
– Disconnect the keyboard cable from the system unit.
– Power-on the computer and check the keyboard cable
connector on the system unit for the voltages shown.
All voltages are ± 5%.
Pin
1
2
3
4
5
6
Voltage(Vdc)
+5.0
Reserved
Ground
+5.0
+5.0
Reserved
1
6
2
3
4
5
ARE THE VOLTAGES CORRECT?
Yes No
002
Replace the system board.
003
On keyboards with a detachable cable, replace the cable.
If the problem remains or if the cable is permanently
attached to the keyboard, replace the keyboard. If the
problem remains, replace the system board.
Printer
1. Make sure the printer is properly connected and
powered on.
2. Run the printer self-test.
If the printer self-test does not run correctly, the problem is
in the printer. Refer to the printer service manual.
If the printer self-test runs correctly, install a wrap plug in
the parallel port and run the diagnostic tests to determine
which FRU failed.
If the diagnostic tests (with the wrap plug installed) do not
detect a failure, replace the printer cable. If that does not
correct the problem, replace the system board or adapter
connected to the printer cable.
228 IBM PC 300/IntelliStation Vol 3 HMM