Technical data

Boot ROM Error Codes
Table 4-2. Boot ROM LED Error Codes
LEDs Probable Cause
0000 0000
No Failure Detected
0000 0.0.
CPU Timer Missing
0.00 0.00
Top RAM Failed
0 •••••••
LEDs failed to acknowledge
.000 000.
CPU Failed
.000 00 ••
Boot ROM Failed Checksum
• 000 0.00
Top RAM Failed
.000 .00.
RAM Failure
• 000 .0.0
Insufficient RAM
• 0 •• 00.0
Keyboard Controller Failed
• 00. 0.00
HP-IB Failed
• 00 •• 000
DMA Failed
• 00 ••• 00
Bit Map Font Failed
.00 • •• 0.
Bit Map Failed
I-oxx xxxx
I/O at xx xxxx Failed
•••• ••••
LEDs Never Accessed
Replace or Do
Processor Board
Check RAM Configuration.
Processor Board
Processor Board
Processor Board
Processor Board .
Add-On RAM Board.
Processor Board.
Processor
Board .
Processor
Board .
Processor
Board .
Processor
Board .
Video
Board .
Video
Board
I/O at Select Code xx xxxx.
Check -12 V dc .
If okay, replace Proces-
sor Board.
Otherwise, replace
Power Supply.
Troubleshooting 31