Dell K7821 manual Beep Codes, User’s Guide

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Light Pattern			Problem Description	Suggested Resolution
			Memory modules are detected, but a	• Ensure that no special memory module
			memory configuration or compatibility	or memory connector placement
G	Y	G	Y error exists.	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.
			Other failure has occurred.	• Ensure that the cables are properly
G	G	G	Y	connected to the system board from the
				hard drive, CD drive, and DVD drive.
				• Check the computer message that
				appears on your monitor screen.
				• If the problem persists, contact Dell. For
				information on contacting Dell, see
				your online User’s Guide.
			The computer is in a normal operating	None.
			condition after POST.
G	G	G	G

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 19 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

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