Epson Apex 20020, 20040 User Manual page 199

Error code Message
Keyboard
301 8042 ERROR
301 KEYBOARD ERROR
302
KEYBOARD IS NON-STANDARD OR DEFECTIVE
303 KEYBOARD LOCKING ERROR
Monochrome display adapter and CRT
401 V-RAM ERROR
402 VIDEO SIGNAL ERROR
403 ATTRIBUTE ERROR
404 CHARACTER SET ERROR
Color graphics adapter and CRT
V-RAM ERROR
501
503
ATTRIBUTE ERROR
504 CHARACTER SET ERROR
505 40-COLUMN CHARACTER SET ERROR
506
COLOR GRAPHICS ERROR
507
640X200 GRAPHICS MODE ERROR
508
SCREEN PAGING ERROR
509 LIGHT PEN ERROR
510
COLOR VIDEO ERROR
Floppy disk drives and controller
601 FLOPPY DISK CONTROLLER ERROR
602
SEQUENTIAL SEEK ERROR
603 RANDOM SEEK ERROR
604
WRITE ERROR
605 READ ERROR
606
DISK CHANGE CHECK REMOVE ERROR
607
DISK CHANGE CHECK INSERT ERROR
Math coprocessor (80287)
701 NOT INSTALLED
702
COPROCESSOR INITIALIZE ERROR
703
COPROCESSOR INVALID OPERATION MASK ERROR
704
COPROCESSOR ST FIELD ERROR
705
COPROCESSOR COMPARISON ERROR
706
COPROCESSOR ZERO DIVIDE MASK ERROR
707
COPROCESSOR ADDITION ERROR
708
COPROCESSOR SUBTRACTION ERROR
709
COPROCESSOR MULTIPLICATION ERROR
710 COPROCESSOR PRECISION ERROR
Performing System Diagnostics
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C-35