Compaq 486 Maintenance And Service Manual page 28

-----------------------------------------------------------------------------
Error
Code Description
-----------------------------------------------------------------------------
303 - 08 Keyboard LED test,
command byte restore
test failed
303 - 09 Keyboard LED test, LEDs
failed to light
304 - 01 Keyboard typematic test
failed
304 - 02 Unable to enter mode 3
304 - 03 Incorrect scan code from
keyboard
304 - 04 No make code observed
304 - 05 Unable to disable typematic
feature
304 - 06 Unable to return to
normal mode
=============================================================================
Table 3-5. Parallel Printer Test Error Codes
=============================================================================
Error
Code Description
-----------------------------------------------------------------------------
401 - 01 Printer failed or not
connected
402 - xx Printer port
402 - 01 Printer data register
failed
402 - 02 Printer control register
failed
402 - 03 Printer data and control
register failed
402 - 04 Printer loopback failed
402 - 05 Printer loopback and data
failed
402 - 06 Printer loopback and control
register failed
402 - 07 Printer loopback, data, and
control register failed
402 - 08 Printer interrupt test failed
Recommended
Action
The following steps apply
to error codes 301 - xx
through 304 - xx:
1. Check the keyboard
connection. If
disconnected, turn
off the computer and
connect the keyboard.
2. Replace the keyboard
and retest.
3. Replace the I/O board
and retest.
Recommended
Action
The following steps apply
to error codes 401 - xx
through 403 - xx:
1. If a printer is
connected, be sure it
is turned ON and in
ONLINE mode.
2. Replace the printer
cable and/or printer
and retest.
3. Replace the I/O board
and retest.