Failure Indications - HP 9000 Series 310 Service Information Manual

Failure Indications
As the self-test progresses, the LED's display the current state. At the end of the test, a power-
up with no errors is indicated by all LEDs turned off and by immediate entry into the boot
scanner.
Should a failure occur during the self-tests, it will be indicated on the LEDs at the end of the
tests. If there was rnore than one failure, the highest priority failure will be indicated on the
LEDs. All the LED values are shown in Table 5-5.
The highest priority failure is also output to the beeper, if present. The lower seven bits of the
LED value are beeped in seven tones as follows:,
• Most significant bit first.
• One second beep per bit.
• A zero (LED off) is represented by a low tone.
• A one (LED on) is represented by a high tone.
If no failure occurs, the beeper will not sound off. If the failure was a Boot ROM checksum
error, the following message will be displayed:
CONTINUE AT OWN RISK (Press RETURN To Continue)
Once this message has been printed, the
I
Return
I
key must be pressed to continue to the boot
scanner. The probability is fairly low that the error will adversely affect the user, but if it does,
it could be catastrophic.
For all other failures, the message:
WAITING 1 MINUTE (Press RETURN To Abort Wait)
will be displayed.
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 OSs found and will not boot one until one in
chosen and entered by the user.
Troubleshooting
115