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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

 

 

 

Gate 20 Error

BIOS cannot access

Reseat memory modules.

 

memory over 1MB.

Replace memory modules.

 

 

 

Parity Error

Fatal memory parity

Reseat memory modules.

 

error. System halts after

Replace memory modules.

 

displaying this message.

 

Boot Failure...

BIOS could not boot from

 

the device. This message

 

is usually followed by

 

information about the

 

specific device.

Reseat the device data and power cables.

Replace the device data cable. Replace the device.

Replace the system board.

Invalid Boot Diskette

Diskette in drive A: not

Replace the diskette.

 

bootable.

 

 

 

 

Drive Not Ready

BIOS could not configure

Reseat the device data and power

 

drive A: during POST.

cables.

 

 

Replace the device data cable.

 

 

Replace the device.

 

 

Replace the system board.

 

 

 

Drive A: Error

BIOS could not configure

Reseat the device data and power

 

drive A: during POST.

cables.

 

 

Replace the device data cable.

 

 

Replace the device.

 

 

Replace the system board.

 

 

 

Insert BOOT Diskette In

BIOS could not find a

Replace the diskette.

A:

bootable diskette in drive

 

 

A:.

 

 

 

 

 

Service Reference Guide

431672-001

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