State And Failure Codes; System Unit Led State And Failure Codes - HP 400 Series Servicing Manual

4.9.5

State and Failure Codes

Table 4-9 lists the LED state and failure codes used by the Boot ROMs.
LEDs State or Failure
A
No failure.
B
C
D
E
F
G
H
A
Top 16 KB of memory
B
missing or not found.
C
D
E
Check memory in
F
slot 0A.
G
H
A
Starting test
B
vector list.
C
D
E
F
G
H
A
Internal
B
C
checksum.
D
E
F
G
H
A
Preloading memory
B
C for main test.
D
E
F
G
H
4-44 Fault Isolation
Table 4-9. System Unit LED State and Failure Codes
LEDs State or Failure
A
Failed CPU
B
C register test.
D
E
Replace emulator
F
board.
G
H
A
Searching for
B
C
user supplied
D
extension ROM.
E
F
G
H
A
Resetting all
B
interfaces.
C
D
E
F
G
H
A
DIO-II
B
C
console testing.
D
E
F
G
H
A
Testing memory.
B
C
D
E
F
G
H
LEDs State or Failure
A
Testing the
B
C top 16 KB
D
of memory.
E
F
G
H
A
Started executing
B
extension ROM
C
D
instructions.
E
F
G
H
A
I/O on-board
B
C test code
D
running.
E
F
G
H
A
Failed Boot ROM
B
checksum.
C
D
E
Replace
F
CPU
G
board.
H
A
Failure:
B
C not enough
D
memory.
E
F
Replace slot 0A
G
memory module.
H
(Continued)