NEC POWERMATE 2000, Инструкция по обслуживанию и справочник

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Troubleshooting 7-7
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.
Problems and Solutions
Problem Symptom Solution
No power Power lamp on system unit does
not light. 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.
Operating system
does not boot Intermittent beeping at power-on.
System beeps more than once
and is unable to complete boot-
up.
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.
“Invalid Configuration” message
displayed. 1. Press F2 to run Setup and correct the
parameters.
2. Replace the CMOS battery (see
Section 3) if the date and time must be set
each time the system is powered on.
System halts during loading
sequence. 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.