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Check Procedures 53
USB device failed. Ensure that the USB device
is properly installed.
Refer to the service manual
for the USB device.
USB device.
USB device cable.
System board.
USB device problems. Refer to the service manual
for the USB device.
Diagnostic Program
Diagnostics programs
cannot be executed.
Reboot the system from the
diagnostics diskette.
Load default settings.
Diagnostics diskette.
Memory module.
System board.
Missing diagnostics file(s). Diagnostics diskette.
Keyboard
Some or all keys on
keyboard do not work.
“Keyboard” on page 65.
Power Supply
Pressing power switch does
not turn off the system.
(Only unplug power cord
from electrical outlet can
turn off system.)
Power switch cable
assembly
“Power Supply” on page 68
Pressing power switch does
not turn on system.
Ensure the power override
switch (situated at the back
of the machine, just above
the connector for the power
cable) is not set to off.
Power switch cable
assembly.
Table 2-3 Error Symptoms List
(Continued)
NOTE:
To diagnose a problem, first find the error symptom
in the left column. If directed to a check procedure,
replace the FRU indicated in the check procedure. If
no check procedure is indicated, the first Action/
FRU listed in right column is the most likely cause.
Error Symptoms Action/FRU