Problems and Solutions

Problem

Symptom

Solution

 

Computer halts during loading

Power the computer off. Check for proper

 

sequence.

jumper settings, then power on the

 

 

computer.

 

 

Check condition of selected bootload

 

 

device (diskette or hard drive) for bad boot

 

 

track or incorrect OS files.

 

 

Try booting OS from diskette or recopy OS

 

 

files onto hard drive.

 

 

Verify correct hard drive is selected.

Diskette drive does not

Lamp on drive panel does not

Check power and signal cable connections

work

light when diskette is loaded.

between diskette drive, system board, and

 

 

power supply.

 

 

Check diskette drive jumpers.

 

 

Check diskette cable. Replace as

 

 

necessary.

 

 

Check power supply.

 

 

Replace diskette drive.

 

 

Replace system board.

Hard drive malfunction

Hard drive lamp does not light

Check cable connections between lamp

 

but hard drive can be accessed.

and system board.

 

Hard drive controller failure

Check that the IDE port and hard drives

 

message displayed.

are enabled in Setup.

 

Cannot access the hard drive.

Check signal/power connections between

 

 

hard drive, system board, and power

 

 

supply.

 

 

Check hard drive jumper settings.

 

 

Check power supply.

 

 

Check hard drive cable and hard drive.

 

 

Replace as necessary.

 

 

Replace system board (or hard disk

 

 

controller board if the system board

 

 

controller is not used).

Memory malfunction

Total memory not recognized.

Reseat DIMMs.

 

 

Systematically swap DIMMs.

 

 

Check to see if the DIMM configuration is

 

 

valid (see Section 3, “Option Installation”).

 

 

Replace DIMMs.

 

 

Replace system board.

 

 

 

4-6 Maintenance and Troubleshooting

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NEC SP B-Series manual Problems and Solutions