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3-2 Dell Latitude LM Systems Service Manual
Table 3-1. POST Beep Codes
Beep Code Error Probable Causes
1-2 Memor
y
module not bein
g
p
ro
p
erl
y
identified or used
Fault
y
memor
y
module or
fault
y
main board
1-2-2-3 ROM BIOS checksum failure Fault
y
main board
1-3-1-1 DRAM refresh failure Fault
y
main board
1-3-1-3 Ke
y
board controller test fail-
ure
Fault
y
ke
y
board or fault
y
main board
1-3-4-1 RAM failure on address line
nnnn
Fault
y
memor
y
module or
fault
y
main board
1-3-4-3 RAM failure on data bits
nnnn
of hi
g
h b
y
te on memor
y
bus
Fault
y
memor
y
module or
fault
y
main board
1-4-1-1 RAM failure on data bits
nnnn
of low b
y
te on memor
y
bus
Fault
y
memor
y
module or
fault
y
main board
2-1-2-3 Check ROM co
py
ri
g
ht
notice failure
Fault
y
main board
2-2-3-1 Interru
p
t mask re
g
ister failure Fault
y
main board