HP 8647A Operation And Service Manual page 127

627
Description
Cause
What To Do
628
Description
Cause
What To Do
BatteryRAMfai1ure:memorylost
The battery-backed RAM lost data.
Either the RAM has failed, the battery is bad, or the
(DEL)
key was held down at power-up.
Check the battery voltage and replace if it is
incorrect.
Non-volatileRAM r e a d / w r i t e f a i l u r e
The controller detected a failure when comparing
data that was written to, and then from non-volatile
RAM.
This is a hardware failure between points on the A3
board.
The A3 board failure should be verified and the board
replaced.
5c-8 Service Error Messages