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POST Error Messages

An error message results if the Power-On Self-Test (POST) encounters a problem. This test runs when the system is turned on, checking assemblies within the computer and reporting any errors found.

Not all computers use all of the codes listed.

Recommended Actions are to be taken in incremental steps. Perform one step at a time and continue only if the action does not cure the problem.

POST Error Messages

Screen Message

Probable Cause

Recommended Action

 

 

 

BIOS ROM checksum

The checksum of the BIOS

Replace the BIOS

error - System halted

code in the BIOS chip is

 

 

incorrect, indicating the

 

 

BIOS code may have

 

 

become corrupt.

 

 

 

 

CMOS battery failed

The CMOS battery is no

Replacement battery.

 

longer functional.

 

CMOS checksum error -

Checksum of CMOS is

Defaults loaded

incorrect, so the system

 

loads the default

 

equipment configuration.

 

A checksum error may

 

indicate that CMOS has

 

become corrupt. A weak

 

battery may have caused

 

this error.

Check the battery and replace if necessary.

CPU at xxxx

Displays the running

Not an error, no action request

 

speed of the CPU.

 

 

 

 

Press ESC to skip

A remind message, not

The user may press Esc to skip the full

memory test

an error.

memory test.

 

 

 

HARD DISK INSTALL

Cannot find or initialize

Make sure the controller is installed

FAILURE

the hard drive controller

correctly. If no hard drives are installed,

 

or the drive.

be sure the Hard Drive selection in Setup

 

 

is set to NONE.

 

 

 

Service Reference Guide

483941-001

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