Specifications

402 - 11 Printer interrupt data, and 1. If a printer is connected, be
controller register failed sure it is turned ON and in
the online mode.
402 - 12 Printer interrupt and 2. Check switch 2 on the
loopback failed diskette/tape controller board
(see Chapter 8). *
402 - 13 Printer interrupt, loopback, 3. Replace the printer and/or the
and data register failed printer controller cable.
4. Replace the diskette/tape
402 - 14 Printer interrupt, loopback, controller board. *
and controller register 5. Replace the system board.
failed
* 286 based COMPAQ Personal
402 - 15 Printer interrupt, Computers only
loopback, data, and
controller register failed
402 - 16 Printer unexpected
interrupt received
403 - 01 Printer pattern test failed
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Error Error Required
Code Description Action
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Video Display Unit (VDU)
5yy-xx
------------------------------------------------------------------------------
501 - 01 VDU controller test failed The following steps apply to error
codes 501 - 01 through 512 - 01:
502 - 01 VDU memory test failed
1. Replace the VDU controller
503 - 01 VDU attribute test failed board.
2. Replace the VDU signal cable.
504 - 01 VDU character set test 3. Replace VDU subassembly.
failed 4. Replace the system board.
505-01 VDU9x14character cell
test
506-01 VDU80x25mode8x8
character cell test
failed
507 - 01 VDU 40 x 25 mode test
failed
508 - 01 VDU 320 x 200 mode color
set 0 test failed
509 - 01 VDU 320 x 200 mode color
set 1 test failed
510 - 01 VDU 640 x 200 mode test
failed
511 - 01 VDU screen memory page test
failed
512 - 01 VDU gray scale test failed