Error Messages - Epson 486SX User Manual

System diagnostics tests (continued)
Device
Dot matrix printer
Hard disk drive(s)
and controller
Alternate parallel
port
Parallel port on a
video adapter

Error Messages

The following table lists all the error messages that may appear
during System diagnostics testing.
System diagnostics error messages
Error code
System board
101
102
103
104
105
106
C-10 Performing System Diagnostics
Tests available
Seek check
Write, read check
Read, verify check
Run all above checks
Message
CPU error
ROM checksum error
Timer counter register error
Timer counter error
Refresh error
DMA page register error
Description
Tests the operation of a
dot matrix printer in
several modes; requires
the printer to be
loaded with paper
Tests the operation of
the hard disk drive(s)
Tests the secondary
parallel port; similar to
primary parallel port test
Tests the parallel port
included on a video
adapter; requires a
loop-back connector
(contact your dealer)