T R O U B L E S H O O T I N G
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Power-on self-test
Whenever the computer is switched on, the POST routine tests
various hardware components, including memory, and compares the
actual configuration of the computer with that recorded in
configuration (CMOS) memory. During this time, BIOS sign-on and
POST messages are displayed.
A configuration discrepancy could arise if you have just installed or
removed a hardware option (for example, if you have added or
replaced a SIMM). In this case you may be diverted directly into the
BIOS set-up. If POST detects a hardware fault, one or more error
messages may be displayed. A full list of these is given at the end of
appendix C ‘
System BIOS and set-up’
.
Your first action should be to turn off the computer, wait at least 30
seconds, and then turn it on again to see if the error is transitory or
persistent. Persistent POST errors may indicate a fault in the system.
The computer may be able to continue despite the error indication
(for example, if a memory chip fails POST, the computer can
sometimes continue with less memory).
If after checking the BIOS settings you are unable to clear the
hardware problem call your supplier or authorised maintainer.
Failure to boot
The computer attempts to boot from a system diskette or bootable
HDD partition.
Failure to boot correctly may result in an error message, most of
which will be from the BIOS. One other may be ;
Non system disk or disk error. Replace and strike any key when ready.
There may be a floppy disk in the drive which is not a bootable
floppy, in which case remove it, or replace it with one that is. If the
message persists there may be a fault with the HDD, in which case,
check the BIOS settings are correct. If they are then the HDD may
need to be reformatted and the system software restored.
