Dell LM P-133ST manual Post Beep Codes

Table 3-1. POST Beep Codes

Beep Code	Error	Probable Causes
1-2	Memory module not being	Faulty memory module or
	properly identified or used	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-	Faulty keyboard or faulty
	ure	main board
1-3-4-1	RAM failure on address line	Faulty memory module or
	nnnn	faulty main board
1-3-4-3	RAM failure on data bits	Faulty memory module or
	nnnn of high byte on memory	faulty main board
	bus
1-4-1-1	RAM failure on data bits	Faulty memory module or
	nnnn of low byte on memory	faulty main board
	bus
2-1-2-3	Check ROM copyright	Faulty main board
	notice failure
2-2-3-1	Interrupt mask register failure	Faulty main board

3-2 Dell Latitude LM Systems Service Manual