Table 5-4b, Model 330/350 Boot
ROM
LED
State and Failure Codes
Continued frorn previous page.
Explanation
RAM gone above FFFFCOOO, no memory found
LEDs Failed
to
acknowledge
or
LED
ripple
CPU
register
test
failure,
or
bad
MC68020
Boot
ROM
checksum failure,
or
bad
Boot
ROM
RAM failure above FFFFCOOO,
or
memory
is
bad
RAM failure,
or
part
of
memory is
bad
Insufficient RAM
to
self-test
or
boot
system
System
Interface
Board
Keyboard
Electronics Failure
Bad
keyboard circuit,
not
system interface
board
System interface
board
HP-IB
failure
D11A failure on system interface
board
Character
font for video
board
missing
or
bad
Video
board
failed
Alpha
video
card
failure
Graphics
failure
on
alpha/graphics
board
I/O
card
on select code 0 failure
I/O
card
on select code 1 failure
through
I/O
card
on
select code 9 failure
through
I/O
card
on
select code 31 failure
LEDs
never accessed (or
LED
ripple)
164
Troubleshooting
LED
Code
o • 0 0
O.
00
0
•••••••
• 0 0 0 0 0
O.
.00000
••
• 0 0 0 0 •
00
• 0 0 0 • 0
O.
.00
0 • 0
.0
• 0 0 • 0
0.0
.00.00
••
• 0
O.
0 •
00
•
00
••
0
00
.00
••
•
00
• 0 0 •
••
O.
.00
••••
0
.00
•••••
• 0 • 0 0 0
00
• 0 • 0 0 0
O.
through
• 0 •
O.
0
O.
through
.0
••••••
••••••••
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