Dell 745c, TJ021 manual Beep Codes

Light Pattern	Problem Description	Suggested Resolution
	Memory modules are detected, but a memory	• Ensure that no special memory
	configuration or compatibility error exists.	module/memory connector placement
		requirements exist.
		• Verify that the memory modules that
		you are installing are compatible with
		your computer.
		• If the problem persists, contact Dell. For
		information on contacting Dell, see your
		online User’s Guide.
	A failure has occurred.	• Ensure that the cables are properly
		connected to the system board from the
	This pattern also displays when you enter system	hard drive, CD drive, and DVD drive.
		• Check the computer message that
	setup and may not indicate a problem.
		appears on your monitor screen.
		• If the problem persists, contact Dell. For
		information on contacting Dell, see your
		online User’s Guide.

Beep Codes

Your computer might emit a series of beeps during start-up if the monitor cannot display errors or problems. This series of beeps, called a beep code, identifies a problem. One possible beep code (code 1 3-1) consists of one beep, a burst of three beeps, and then one beep. This beep code tells you that the computer encountered a memory problem.

If your computer beeps during start-up:

1Write down the beep code.

2See "Dell Diagnostics" on page 21 to identify a more serious cause.

3Contact Dell for technical assistance. For information on contacting Dell, see your online User’s Guide.

Code	Cause	Code	Cause
1-1-2	Microprocessor register failure	3-1-4	Slave interrupt mask register failure
1-1-3	NVRAM read/write failure	3-2-2	Interrupt vector loading failure
1-1-4	ROM BIOS checksum failure	3-2-4	Keyboard Controller test failure
1-2-1	Programmable interval timer failure	3-3-1	NVRAM power loss
1-2-2	DMA initialization failure	3-3-2	Invalid NVRAM configuration
1-2-3	DMA page register read/write failure	3-3-4	Video Memory test failure
1-3	Video Memory test failure	3-4-1	Screen initialization failure

Quick Reference Guide

27