Table 5-3. General Failure Led Indications - HP 330 Service Information Manual

The Boot ROM will time out after approximately one minute and will then continue into the
boot scanner. This allows time for the display to warm up and for the user to read the error
messages. These failures are usually non-fatal so, in an Unattended Mode, the Boot ROM will
still boot the first OS it finds. Pressing I
Return
I will terminate the beeping error code and abort
the one minute wait. Pressing
I
Return
I will also make the computer revert to the Attended Mode.
This means that the Boot ROM will display all OSses found and will not boot one until one in
chosen and entered by the user.
General Description of Failure Codes
Table 5-3 shows the general meaning of error codes. These codes are explained further in other
tables. LED patterns are represented by a black dot for on and a white dot for off. Letter
designators indicate the LED in that position is on or off, depending on the binary code used
to represent the device or failure type.
Table 5-3. General Failure LED Indications
Upper 2 Bits Fail Indicator LED Code and Failure Description
State Indication Only:
00
SS SSSS
Where SS SSSS Indicates State of Power-up
Required Device Missing or
O.
DD DDDD
DTACK Failure: Where DD DDDD Indicates Device
Failing Device:
. 0
DD DDDD
Where DD DDDD Indicates Device
Special Codes (Special Case Highest
••••••••
Priority Codes):
LEDs Never Accessed (or U nnsed Code) 0 • • • • •
••
LEDs Failed to DTACK 0 0 0 0 0 •
O.
Timer on processor board has failed or is missing.
Lower 2 Bits State or Device Codes
LED Code and Failure Description
Miscellaneous (Highest Priority):
XX
00
FFFF
Where FFFF indicates Failure (Xs are don't-care bits)
Internal Peripheral Failure (Medium
XX
O.
PPPP
Priority): Where PPPP is Peripheral Number
I/O Card Failure (Lowest Priority): XX. S SSSS
Where S SSSS is Select Code
State and Failure Codes
Table 5-4a is a list of all LED failure codes used in the computer Boot ROMs. Codes are listed
here in numerical order for easy reference, and then again in order of occurrence and priority.
162
Troubleshooting