5c-8
Service Error Messages
626 Volatile RAM read/write failure
Description The controller detected a failure when comparing data that was written to,
and then read from volatile RAM.
Cause This is a hardware failure between points on the A3 board.
What To Do The A3 board failure should be verified and the board replaced.
627 Battery RAM failure: memory lost
Description The battery-backed RAM lost data.
Cause Either the RAM has failed, the battery is bad, or the
DEL key was held
down at power up.
What To Do Check the battery voltage and replace it if it is incorrect.
628 Non-volatile RAM read/write failure
Description The controller detected a failure when comparing data that was written to,
and then from non-volatile RAM.
Cause This is a hardware failure between points on the A3 board.
What To Do The A3 board failure should be verified and the board replaced.
629 dsp board failure:
Description The dsp board self test has failed.
Cause Either the dsp board (attached to the display) or the A3 controller has
failed.
What To Do Check the dsp board first for problems. If the dsp board is normal, check
the A3 controller.
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