NEC POWERMATE ES 5200 - SERVICE, Service Manual

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8-8 Troubleshooting
Problems and Solutions
Problem Symptom Solution
Operating system
does not boot,
cont’d “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 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, 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.
Diskette drive does
not work Lamp on drive panel does not light
when diskette is loaded. 1. Check power and signal cable
connections between diskette drive, riser
board, and power supply.
2. Check diskette drive cable. Replace as
necessary.
3. Check power supply.
4. Replace diskette drive.
5. Replace riser board.
6. Replace system board.
Hard drive
malfunction Hard drive lamp does not light but
hard drive can be accessed. 1. Check cable connections between lamp
and system board.
Hard drive controller failure
message displayed. 1. Check that the IDE channel and hard
drives are enabled in Setup (see Section 2).
Cannot access hard drive. 1. Check signal/power connections
between hard disk, PCB, power supply.
2. Check hard drive jumper settings.
3. Check power supply.
4. Check hard drive cable and hard drive.
Replace as necessary.
5. Replace system board (or hard drive
controller PCB if the system board
controller is not used).
6. Replace riser board.