NEC POWERMATE PRO2180 - SERVICE 1996, Руководство по обслуживанию

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4-8 Maintenance and Troubleshooting
Table Section 4-6 Problems and Solutions
Problem Symptom Solution
Power supply
malfunction Any one or more of the
following conditions could
occur: 1 . Perform steps 1 through 4 listed in this
table under No Power.
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.
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 and
Section 1 for the power supply
specifications.
3 . Replace power supply.
Operating system
does not boot Intermittent beeping at
power-on. Computer beeps
more than once and is unable
to complete boot-up.
1 . Check system configuration and switch
settings (refer to Appendix B).
2 . Verify that drives are enabled.
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.
“Invalid Configuration”
message displayed. 1 . Press F1 to run Setup and correct the
parameters.
2 . Replace the CMOS battery if the date
and time must be set each time the
computer is powered on.
Computer halts during
loading sequence. 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 or hard disk) for bad boot
track or incorrect OS files.
3 . Try booting OS from diskette or recopy
OS files onto hard disk.
4 . Verify correct hard disk is selected.