HP 9020 Service Manual page 219

Error Messages
Appendix
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Introduction
Several types of error messages are output to the display and/or printer. Other failures result in
audible messages via the keyboard beeper. This subsection describes all computer error messages
and indications.
The error messages and indirations are listed below and individually described in the following
paragraphs:
Beeping at O.5-second repeat rate
Beeping at 2-second repeat rate
"Clock and date not set. "
"Self test error 1: 10 address M, SS STATUS: XXXXXXXX"
"Self test error 2: CHECKSUM for segment NN"
"Self test error 3: XXXX NN"
"Self test error 4: Memory reduced to: NNNNNNNN bytes. MCs: <me list>"
"Self test error 5: Fewer finstrates were found than expected."
"System halted due to double bit memory error on MC # NN CCCCCCCC"
"System halted: Incompatible lOPs"
"System halted: Insufficient memory to start system"
"System halted: System error"
Fast Beep
Audible Message
Beeping at O.5-second repeat rate.
Indicates
Major failure during system load.
Action
Try different system discs.
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