HP 300

Table 5-6. Boot ROM LED State Codes (in order of occurrence)
Explanation
LED ripple (all on, then off in sequence from MSB)
Testing top RAM
Searching for
boot extension ROMs
Starting test vector list
Testing Processor Board Timer
Resetting I/O
Testing Alpha Card
Testing processor board video circuits
Testing processor
board keyboard electronics
Testing accessory
card keyboard electronics
Checksumming Boot
ROM
Preloading RAM
Testing graphics on
alpha/raphics cad
Testing processor board HP-IB
Testing DMA Card
Testing I/O card on Select Code 0
Testing I/O card on Select Code 1
through
Te ing I/O Card on Select Code 9
through
Testing I/O card on Select Code 31
Checksumming ROM systems
Testing RAM
LED Code
0000000.
00000.00
00000 •• 0
00000 •••
00000.0.
000000.0
000 •••• 0
000 ••• 0.
000.00.0
000.00 ••
000000 ••
0000.000
000 •••••
000.0.00
000 •• 000
00.00000
00.0000.
through
00.0.00.
through
00 ••••••
0000 •• 0.
0000.00.
Troubleshooting 119
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