NEC POWERMATE P - SERVICE MANUAL 1996 Service And Reference Manual page 111

Problem
Power supply malfunction
Operating system does not boot
Table Section 4-6 Problems and Solutions
Symptom
Any one or more of the
following conditions could
occur:
Front panel lamps out, diskette
and/or hard drives do not spin,
monitor blank, interface ports not
working, and keyboard lamp out
and/or cannot input from
keyboard.
Intermittent beeping at power-on.
Computer beeps more than once
and is unable to complete boot-
up.
"Invalid Configuration" message
displayed.
Computer halts during loading
sequence.
Maintenance and Troubleshooting
Solution
Measure voltages with the
system board installed.
5. Replace power supply.
6. Replace system board.
1. Perform steps 1 through 4
listed in this table under No
Power.
2. Check power supply
voltages. Voltages should be
measured with a load on them
(system board plugged in). See
Appendix A for connector pin
assignments.
3. Replace power supply.
1. Check system configuration.
2. Check all jumper settings
and verify that drives are enabled
(refer to Section 2).
3. Reseat SIMMs and option
boards in their connectors.
Inspect system board for
dropped objects.
4. Remove option boards and
reboot.
5. Replace system board.
F2
1. Press
correct the parameters.
2. Replace the system board if
the date and time must be set
each time the computer is
powered on. (The RTC/battery
backup chip may be defective.)
1. Power the computer off.
Check for proper jumper settings
(Appendix B), then power-on the
computer.
2. Check condition of selected
bootload device (diskette or hard
disk) for bad boot track or
incorrect OS files.
4-7
to run Setup and