4-6 Maintenance and Troubleshooting
Table Section 4-2 PowerMate P System Error Messages
Message
Description
XXXX is the hex address where the error occurred.
Parity Error ????
Parity error in system memory at an unknown address.
Table Section 4-4 ISA NMI Error Messages
Message
Description
Memory Parity Error at xxxxx
Memory failed. If the memory location can be determined, it is
displayed as xxxxx. If not, the message is Memory Parity
Error ????.
I/O Card Parity Error at xxxxx
An expansion card failed. If the address can be determined, it is
displayed as xxxxx. If not, the message is I/O Card Parity Error
????.
DMA Bus Time-out
A device has driven the signal for more than 7.8 microseconds.
Diagnosing and Solving Problems
One beep indicates that the system has completed its POST test. If intermittent beeping
occurs, power off the system and try again. If the beeping persists, see
Table Section 4-6
. The ta-
ble summarizes problems that may develop during system operation and lists (in sequential
order) suggested corrective actions.
Table Section 4-6 Problems and Solutions
Problem
Symptom
Solution
No power
Power lamp on computer status
panel will not light.
1
.
Check that the power cord is
plugged into the AC connector on
the computer.
Check that the other end of the
cord is plugged into a live
properly grounded AC power
outlet.
2
.
Check cable connections
between power supply and
system board.
3
.
Systematically eliminate
possible shorted PCBs by
removing cables and expansion
boards.
4
.
Check the +5 and +12 power
supply voltages (see Appendix A,
Connector Pin Assignments).