Mitsubishi Electric Apricot LS660 Owner's Handbook Manual page 42

T r o u b l e s h o o t i n g
Number of beeps
One long and two short
beeps
Two long and two short
beeps
Number of beeps
1-1-3
1-1-4
1-2-1
1-2-2
1-2-3
1-2-4
1-3-1
1-3-2
1-3-3
1-3-4
1-4-1
1-4-2
1-4-4
2-2-2
2-2-3
2-2-4
2-3-1
2-3-3
2-4-3
2-4-4
5/4 LS/VS660 OWNER'S HANDBOOK
Explanation
This means that either the video system is faulty, or that a video
I/O adapter ROM is not readable.
The video subsystem cannot be supported by the main system
POST. This can occur when the video subsystem is replaced or
changed on site.
Many of these following codes indicate a more serious fault in
which the BIOS stops. Switch off for 20-30 seconds and try again.
If the fault persists, make a note of it and call your maintenance
provider.
Meaning
CMOS write/read test failure
BIOS ROM checksum failure
Programmable Interval Timer test failure
DMA initialisation failure
DMA page register read/write test failure
RAM refresh verification failure
First 64K RAM test failure
First 64K RAM parity test failure
Slave DMA register test failure
Master DMA register test failure
Master interrupt mask register test failure
Slave interrupt mask register test failure
Keyboard controller test failure
Search for video ROM test failure
Screen believed inoperable
Timer tick interrupt test failure
Interval timer channel 2 test failure
Time-of -day clock test failure
CMOS memory size against actual compare failure
Memory size mismatch occurred