Dell T5400 manual System Messages, Ensure that the memory you are using is

Code	Description	Suggested Remedy
(repetitive
short beeps)
4	RAM Read/Write	• Ensure that no special requirements for
	failure.	memory module/connector placement
		exist (see "Memory" in your User’s Guide).
		• Ensure that the memory you are using is
		supported by your computer (see "Memory"
		in your User’s Guide).
		• If the problem persists, contact Dell (see
		"Contacting Dell" in your User’s Guide).
5	Real time clock failure.	• Replace the battery (see "Replacing the
	Possible battery failure	Battery" in your User’s Guide).
	or motherboard failure.	• If the problem persists, contact Dell (see
		"Contacting Dell" in your User’s Guide).
6	Video BIOS Test	Dell (see "Contacting Dell" in your User’s
	Failure.	Guide).

System Messages

NOTE: If the message you received is not listed in the following table, see the documentation for either the operating system or the program that was running when the message appeared.

A L E R T ! P R E V I O U S A T T E M P T S A T B O O T I N G T H I S S YS T E M H A V E F A I L E D A T C H E C K P O I N T

[N N N N ] . F O R H E L P I N R E S O L V I N G T H I S P R O B L E M , P L E A S E N O T E T H I S C H E C K P O I N T A N D C O N T A C T D E L L TE C H N I C A L S U P P O R T — The computer failed to complete the

boot routine three consecutive times for the same error (see "Contacting Dell" in your User’s Guide for assistance).

C M O S C H E C K S U M E R R O R — Possible motherboard failure or the real-time clock battery charge is low. Replace the battery (see "Replacing the Battery" or "Contacting Dell" in your User’s Guide for assistance).

CPU F A N F A I L U R E — CPU fan failure. Replace the CPU fan (see "Removing the Processor" in your User’s Guide).

F L O P P Y D I S K E T T E S E E K F A I L U R E — A cable may be loose, or the computer configuration information may not match the hardware configuration. Check cable connections (see "Contacting Dell" in your User’s Guide for assistance).

D I S K E T T E R E A D F A I L U R E — The floppy disk may be defective or a cable may be loose. Replace the floppy disk and/or check for a loose cable connection.

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Quick Reference Guide