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Table 2-2 Symptoms (cont.)
Indicator LEDs
Option Indicator LEDs
Probable Cause
Corrective Action
System
Expansion 2 Mbyte
Unit
CPU
I/O
Box
Memory
Modem
Video displayed on screen
on
off
off
on
off
off
Normal settings
No corrective action is necessary.
off
off
off
on
off
off
System unit LED
Check LED connection and CPU
board. Replace LED assembly if
blown.
on
on
off
CPU board jumpers
Check jumpers. See paragraph
2.3.2.
~
c
CPU board
Reseat. Replace if conditions per-
;:
~
sisto See Appendix C for error
-
~
numbers.
~
c
c
off
I/O board
Reseat. Replace if conditions per-
.....
on
on
~.
;:\
sisto See Appendix C for error
Cici
numbers.
.....
~
~
on
off
off
on
on
off
Memory option
Reseat. See Appendix C for error
~
numbers.
~
off
off
off
Modem option
Reseat. See Appendix C for error
;:,
on
on
on
.....
~
(or
numbers.
~
flashes)
*
off
off
off
off
off
Expansion box not
Check pins on expansion box.
.,
on
iii
correctly attached to
.....
~.
c
t:--
system unit
;:
.......
W
Power regulator
Reseat. Replace if faulty.
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Table of Contents
Troubleshooting
