T r o u b l e s h o o t i n g
7/4 MS660 OWNER’S HANDBOOK
Number of beeps
Meaning
1-3-3
Slave DMA register test failure
1-3-4
Master DMA register test failure
1-4-1
Master interrupt mask register test failure
1-4-2
Slave interrupt mask register test failure
1-4-4
Keyboard controller test failure
2-2-2
Search for video ROM test failure
2-2-3
Screen believed inoperable
2-2-4
Timer tick interrupt test failure
2-3-1
Interval timer channel 2 test failure
2-3-3
Time-of -day clock test failure
2-4-3
CMOS memory size against actual compare
failure
2-4-4
Memory size mismatch occurred
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.
Boot failure message
Explanation
Non-system disk or disk error The diskette drive contains a non-system
diskette. Replace it with a system diskette
and press F1.
Diskette read failure
The diskette is either not formatted or
defective. Replace it with a system diskette
and press F1.
No boot sector on fixed disk
The hard disk has no active, bootable
partition or is not formatted. Insert a system
diskette, press F1, and format the hard disk
as described in your operating system
manuals.
Fixed disk read failure
The hard disk may be defective. Press F1 to
retry. Make sure the drive is correctly
specified in the BIOS setup utility. If the
