Diagnostics; Problems And Solutions - NEC POWERMATE 2000 Service And Reference Manual

Diagnostics

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
the following table. The table summarizes problems that might develop during
system operation and lists (in sequential order) suggested corrective actions.
Problem
No power
Operating system
does not boot

Problems and Solutions

Symptom
Power lamp on system unit does
not light.
Intermittent beeping at power-on.
System beeps more than once
and is unable to complete boot-
up.
"Invalid Configuration" message
displayed.
System halts during loading
sequence.
Solution
1. Check that the AC power adapter is
plugged into the DC power socket on the
system unit.
Check that the other end of the AC power
adapter is plugged into a live, properly
grounded AC power outlet.
2. Systematically eliminate possible shorted
PCBs by removing cables and daughter
boards.
3. Check +5 and +12 power supply voltages.
Measure voltages with system board
installed.
4. Replace the AC power adapter.
5. Replace the system board.
1. Check system configuration (see
Section 2).
2. Check jumper settings and verify that
drives are enabled (see Section 2).
3. Reseat SO-DIMMs. Inspect system board
for foreign objects such as paper clips.
4. Replace system board.
1. Press F2 to run Setup and correct the
parameters.
2. Replace the CMOS battery if the date and
time must be set each time the system is
powered on (see Section 3).
1. Power the system off. Check for proper
jumper settings (see Section 2), then power-
on the system.
2. Check condition of selected bootload
device (diskette, CD-ROM disc, or hard disk)
for bad boot track or incorrect OS files.
3. Try booting OS from diskette or disc, or
recopy OS files onto hard disk.
4. Verify correct hard disk is selected.
Troubleshooting 7-7