Dell Latitude LM Service Manual page 35

3-4 Dell Latitude LM Systems Service Manual
Table 3-2. System Error Messages
Message
Keyboard error
Operating system
not found
Parity check 1
nnnn
Parity check 2
nnnn
Real time clock
error
Shadow RAM
failed at off-
set: nnnn
System battery
is dead—Replace
and run Setup
System cache
error—cache
disabled
Definition
Keyboard not respond-
ing correctly.
Operating system can-
not be found on hard-
disk drive or on diskette
in diskette drive.
Parity error in system
bus at address nnnn.
Parity error in I/O bus
at address nnnn.
CMOS battery that
supports data stored in
NVRAM may be dead.
Shadow RAM failed at
address nnnn.
CMOS battery dead.
Primary cache failed.
(Continued)
Probable Causes
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.
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.
Faulty main board.
Faulty main board.
Faulty battery. Faulty
main board.
Faulty or improperly
seated memory mod-
ule. Faulty main board.
Faulty CMOS battery
or main board.
Faulty microprocessor.