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Beep Codes and Error Messages 3-3
Failing bits:
nnnn
Memory failed at RAM
address nnnn.
Faulty or improperly
seated memory mod-
ule. Faulty main board.
Fixed disk 0
failure
Hard-disk drive not
responding to
commands from
computer.
Corrupted hard-disk
drive boot sector or
configuration file.
Faulty hard-disk drive.
Faulty main board.
Fixed disk con-
troller failure
Hard-disk drive or con-
troller not responding to
commands from
computer.
Faulty hard-disk drive.
Faulty main board.
Incorrect drive A
type—run Setup
Diskette drive not iden-
tified properly in the
Setup program.
Incorrect drive
configuration. Faulty
connections. Faulty dis-
kette drive. Faulty main
board.
Keyboard control-
ler error
Keyboard controller
faulty.
Faulty keyboard
connection. Faulty key-
board. Faulty main
board.
Keyboard error
Keyboard not respond-
ing correctly.
Built-in keyboard:
faulty keyboard or key
pressed while com-
puter booting.
External keyboard:
cable or connector
loose. Faulty keyboard
or key pressed while
computer booting.
Operating system
not found
Operating system can-
not be found on
hard-disk drive or on
diskette in diskette
drive.
Incorrect drive
configuration. Operat-
ing system not installed
on hard-disk drive or
diskette drive not
bootable. Faulty con-
nections. Faulty drive.
Faulty main board.
Parity check 1
nnnn
Parity error in system
bus at address nnnn.
Faulty main board.
Parity check 2
nnnn
Parity error in I/O bus
at address nnnn.
Faulty main board.
Table 3-2. System Error Messages
(continued)
Message Definition Probable Causes