NEC Express 5800/120Lg, Service Manual

Page: 143 / 204

Problem Solving 5-11
Specific Problems and Corrective Actions
This section provides possible solutions for the following specific problems:
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Power LED does not light
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No beep or incorrect beep pattern
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No characters appear on screen
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Characters on the screen appear distorted or incorrect
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System cooling fan does not rotate
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Diskette drive activity LED does not light
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Hard disk drive activity LED does not light
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CD-ROM drive activity LED does not light
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Problems with application software
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The startup prompt “Press <F2> key if you want to run Setup” does not appear on
the screen.
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The bootable CD-ROM is not detected.
Try the solutions in the order given. If you cannot correct the problem, contact your
service representative for assistance.
Power LED Does Not Light
Check the following:
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Is the system operating normally? If so, the power LED is probably defective.
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Are there other problems with the system? If so, check the items listed under System
Cooling Fans Do Not Rotate.
Incorrect or No Beep Code
Check the following:
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Is the speaker operating?
If the system operates normally, but there was no beep, the speaker may be defective,
contact your service representative for assistance.
Record the beep code emitted by POST, and see the “Messages and Beep Codes”
section found later in this chapter.