NEC PowerMate VT 300i Series Service And Reference Manual page 117

Problem Symptom
No power (cont'd)
Power supply Any of the following conditions
malfunction 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.
Operating system Intermittent beeping at power-on.
does not boot Computer beeps more than once
and is unable to complete boot-up.
"Invalid Configuration" message
displayed.
Computer halts during loading
sequence.
Problems and Solutions
Solution
4. Check +5 and +12 power supply
voltages. Measure voltages with system
board installed.
5. Replace the power switch assembly.
6. Replace the power supply.
7. Replace the 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).
3. Replace the power supply.
1. Check system configuration (see
Section 2).
2. Check all jumper settings and verify that
drives are enabled (see Section 2).
3. Reseat DIMMs and option boards in
their connectors. Inspect system board for
foreign objects such as paper clips.
4. Remove option boards and reboot.
5. Replace system board.
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 computer is powered on.
1. Power the computer off. Check for
proper jumper settings (see Section 2), then
power-on the computer.
2. Check condition of selected bootload
device (diskette, 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