Chapter 22 Solving Problems: Troubleshooting/Error Messages
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Verifying Prope r Opera tion of the Serve r Lights

As POST determines the server configuration, it tests for the presence of each mass storage device
installed in the server. As each device is checked, its activity light should turn on briefly. Check
for the following:
❑ Does the diskette drive activity light turn on briefly? If not, refer to "Diskette Drive Activity
Light Does Not Light" on page 268.
❑ If there is a hard disk drive or a SCSI device installed in the server, does the drive activity light
on the front panel turn on briefly? If not, refer to "Hard Disk Drive Activity Light Does Not
Light" on page 268.
✏NOTE
For information about the controls and indicators, see Chapter 1.

Confirming Loading of the Ope rating Sy stem

Once the server boots up, the operating system prompt appears on the screen. The prompt varies
according to the operating system. If the operating system prompt does not appear, refer to "Initial
Startup of the Server" on page 262.

Specific Problems and Corrective Actions

This section provides possible solutions for the following specific problems:
• Power light does not light.
• Server cooling fans do not rotate or rotate slowly.
• No characters appear on screen.
• Characters on the screen appear distorted or incorrect.
• No beep or incorrect beep pattern emitted.
• Activity light on the diskette drive does not light.
• Activity light on the hard disk drive does not light.
• Activity light on the CD-ROM drive does not light.
• Application software problems are unresolved.
• Server powers up, and it immediately powers down.
Try the solutions in the order given. If you cannot correct the problem, contact your service
representative or authorized dealer for assistance.