Mitsubishi Electric apricot ft series Owner's Handbook Manual page 70

Terminal POST errors and beep codes
There are several POST routines that shut down the computer if
they fail. If possible, the BIOS displays a two-digit hexadecimal
code and/or sounds a sequence of beeps to identify the point at
which POST failed. The most usual errors are listed below.
The BIOS also issues one long tone followed by two short tones if
the video system is faulty or if an external ROM module (including
video ROM) fails.
Turn off the computer for 30 seconds and then try again. If the
fault persists, make a note of the error code (if any) and call your
supplier or authorised maintainer.
Code Beeps
16 1-2-2-3
20 1-3-1-1
22 1-3-1-3
2C xxxx 1-3-4-1
2E xxxx 1-3-4-3
30 xxxx 1-4-1-1
46 2-1-2-3
58 2-2-3-1
98 1-2
B I O S S e t u p & P O S T
Test which failed
BIOS ROM checksum
DRAM refresh.
8742 keyboard controller
RAM failure on address line xxxx.
RAM failure on data bits xxxx of low
byte of memory bus.
RAM failure on data bits xxxx of high
byte of memory bus.
Check ROM copyright notice
Test for unexpected interrupts
Video configuration failure, or option
ROM checksum failure. (One long,
two short beeps.)
OWNER'S HANDBOOK 7/7