Dell NT505 manual Beep Codes, Code Cause

Light Pattern	Problem Description	Suggested Resolution
	Another failure has	• Ensure that all hard drive and
	occurred.	CD/DVD drive cables are properly
		connected to the system board (see
		"System Board Components" in your
		User’s Guide).

• If there is an error message on the screen identifying a problem with a device (such as the floppy drive or hard drive), check the device to make sure it is functioning properly.

• If the operating system is attempting to boot from a device (such as the floppy drive or CD/DVD drive), check system setup (see "System Setup" in your User’s Guide) to ensure the boot sequence is correct for the devices installed on your computer.

• If the problem persists, contact Dell (see "Contacting Dell" in your User’s Guide).

Beep Codes

Your computer may emit a series of beeps during start up. The series of beeps is called a beep code and can be used to help identify a problem with your computer.

If your computer emits a series of beeps during start-up:

1Write down the beep code.

2Run the Dell Diagnostics to identify the cause (see "Dell Diagnostics" on page 41).

Code	Cause
2 short, 1 long	BIOS checksum error
1 long, 3 short, 2 short	Memory error
1 short	F12 key pressed

Quick Reference Guide

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