Problems when starting
If you suspect a blown fuse
In the United Kingdom, and some other countries,
AC plugs contain fuses. If the fuse in the system's unit
AC plug blows when you turn on the computer, this
may be caused by an AC power surge, but is more
often a symptom of problems with the computer or
its peripherals. Follow these steps:
Turn off the computer and unplug all power
Unplug all peripherals.
Try to discover the cause of the fault. If none is
apparent, replace the blown fuse with one of the
same rating, reconnect the system unit power
cord and try to turn it on again.
If the replacement fuse blows, call your supplier
or maintenance provider.
If the replacement fuse does not blow, reconnect
a peripheral and turn it on. Repeat this step for
each peripheral in turn.
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T r o u b l e s h o o t i n g
Power-on self-test (POST)
Whenever the computer is turned on, the BIOS
POST routine tests various hardware components,
configuration of the computer with that recorded in
If POST detects a hardware fault, one or more POST
error codes or messages may be displayed. See the
BIOS Setup & POST chapter for more information
Failure to boot
On completion of POST, the computer attempts to
boot from a system diskette or bootable hard disk
partition. The table below lists some of the messages
that might appear during the boot sequence.
Non-system disk or disk error
The diskette drive contains a non-system
diskette. Replace it with a system diskette and