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Mitsubishi Electric apricot MS660 Owner's Handbook Manual Page 69

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T r o u b l e s h o o t i n g
Power-on self-test (POST)
Beep Codes
Whenever the computer is turned on, the power-on self-test
(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 Setup utility.
If POST detects a hardware fault, one or more POST error codes
and messages are displayed. A full list of these is given at the end of
'System BIOS and Setup'. You may also be prompted to "Press the
F1 key to continue" or "Press any key when ready". The computer
may be able to continue despite the error indication (for example, if
a memory chip fails POST, the computer can continue with less
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
Check that all external cables are securely connected.
Try running the BIOS Setup utility to reconfigure the system.
Open up the system unit and check that all internal signal and
power cables are securely connected.
If the problem persists, call your supplier or authorised maintainer.
The computer uses special audio beep codes to signal certain
hardware faults. If you hear a beep code which is not accompanied
by a POST error message, call your supplier or authorised
The system may halt completely with some of the errors and the
beep code will keep repeating after a brief pause.


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