Technical data

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Test Descriptions
3
Failure during command: XX
Keyboard Controller timed out waiting for Output
Buffer Full
Failure of keyboard
controller to send back a
byte as a result of a
command given to the
keyboard controller itself.
Indicates a possible problem
with the keyboard controller
embedded firmware or
hardware.
Controller Command mismatch error
Value written:
XX Value read: XX
Command byte read from
keyboard controller does not
equal what was sent.
Indicates possible problem
with bus interface to
keyboard controller, or its
embedded firmware.
Keyboard Controller Failed Self Test (0xAA)
Keyboard controller self-test
command returned result
that indicates a failure. May
indicate a problem with the
embedded firmware.
Controller RAM mismatch error
Value written:
XX Value read: XX
The value read from one of
the keyboard controller
RAM locations does not
equal to what was written,
indicating a possible
problem with the controller,
or it’s embedded firmware.
Invalid result from Password Test command
The password test command
failed, returning an invalid
result, indicating that there
may be a problem with the
embedded firmware.
Table 3-10. KBD8730x Error Messages (Continued)
Error Message Symptom or Cause