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Problem Solving 5-7
Confirming Loading of the Operating System
Once the system 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 Problems With Application Software found
later in this chapter.
Specific Problems and Corrective Actions
This section provides possible solutions for the following specific problems:
power LED does not light
system cooling fans do not rotate
no characters appear on screen
characters on the screen appear distorted or incorrect
floppy disk drive access LED does not light
hard disk drive access LED does not light
RCU does not boot
problems with application software.
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.
Is the system operating normally? If so, the power LED is probably
defective.
Are there other problems with the system? If so, check the items listed
under System Cooling Fans Do Not Rotate.
System Cooling Fans Do Not Rotate
Note:
In addition to the cooling fans that are an integral
part of each power supply, the system has an option board
fan and four CPU fans. The four CPU fans are redundant in
configuration. This means if one fan fails, its associated fan
changes its rotating speed to high. There are no serviceable
components inside the power supply. If the power supply is
opened, the manufacturer's warranty is voided.