Dell Latitude LM, Service Manual, Page: 33 / 87

3-2 Dell Latitude LM Systems Service Manual
Table 3-1. POST Beep Codes
Beep Code Error Probable Causes
1-2 Memory module not being
properly identified or used Faulty memory module or
faulty main board
1-2-2-3 ROM BIOS checksum failure Faulty main board
1-3-1-1 DRAM refresh failure Faulty main board
1-3-1-3 Keyboard controller test fail-
ure Faulty keyboard or faulty
main board
1-3-4-1 RAM failure on address line
nnnn Faulty memory module or
faulty main board
1-3-4-3 RAM failure on data bits
nnnn of high byte on memory
bus Faulty memory module or
faulty main board
1-4-1-1 RAM failure on data bits
nnnn of low byte on memory
bus Faulty memory module or
faulty main board
2-1-2-3 Check ROM copyright
notice failure Faulty main board
2-2-3-1 Interrupt mask register failure Faulty main board