AT&T PC 6300 - Keyboard

MAINTENANCE
15. Using the recorded error message and the table shown in
Figure 5-18, determine the module that generated the failure
and replace that module.
ERROR NO.
PROBABLE CAUSE
MODULE
401
Bad 8041 or 8741
Controller on Motherboard.
Motherboard
402 Bad 8039, 8049, or 8749
in Keyboard
or Keyboard not connected.
Keyboard
403
8039 in Keyboard
indicated a stuck key
error.*
Keyboard
405
Operator indicated that
keys on Keyboard are
not working properly.
Keyboard •
406
Operator indicated that
LEDs on Keyboard are not
working properly.
Keyboard
408
Interruption Keyboard not
functioning.
Motherboard
* See Customer and System Teat ERROR messages on
how to locate a stuck key.
Figure 5-18. Keyboard Troubleshooting Chart
5-72
•0
0
"Lr
0
Q
n
D
A
Q
n
A '
V
0
0
D
D
n
n
0
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