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Maintenance & Service Guide
Presario 2250 Series
2510, 2410 ES & 4240 ES Personal Computers

Home  |   Preface    |   Product Description   |   Troubleshooting   |   Illustrated Parts   |    Removal & Replacement
Jumpers & Switches   |   Specifications   |   Connector Pins    |   Power Cord Requirements


POST Error Messages

An error message displays if the POST encounters a problem. This test automatically runs each time the system is turned on, checking assemblies within the computer and reporting any errors found.

Click on an item for explanations of the error codes and a recommended course of action.

Error Code Message Samples

Diskette Drive A or B Error Failing Bits nnn Fixed Disk Controller Failure
Extended RAM failed at offset nnn Fixed Disk 0 or 1 Failure Incorrect Drive A Type
Invalid NVRAM Media Type Keyboard Controller Error Keyboard Error
Operating System Not Found Parity Check 1 Parity Check 2
Real Time Clock Error System Battery is Dead System BIOS Shadowed
System Cache Error System CMOS Checksum Bad System RAM Failed at Offset, nnn
System Timer Error UMB Upper Limit Segment Address nnn Video BIOS Shadowed

 

Diskette Drive A or B Error

Probable Cause

Recommended Action

Drive A: is present, but fails the BIOS POST diskette tests

1. Run Setup.
2. Replace the signal cables.
3. Replace the drive.

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Extended RAM failed at offset nnn 

Probable Cause

Recommended Action

Extended memory not working or not configured properly

1. Replace the memory modules.
2. Replace the system board.

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Failing Bits nnn

Probable Cause

Recommended Action

nnn is a map of the bits at the RAM address which failed the memory test

1. Run Setup.
2. Replace the system board.

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Fixed Disk 0 or 1 Failure

Probable Cause

Recommended Action

Hard drive is not working or configured properly

1. Run Setup.
2. Replace the signal cable.
3. Replace the hard drive.

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Fixed Disk Controller Failure

Probable Cause

Recommended Action

Hard drive is not working or configured properly

1. Run Setup.
2. Replace the system board.

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Incorrect Drive A Type

Probable Cause

Recommended Action

Type of diskette drive A: not correctly identified

1. Run Setup.
2. Replace the diskette drive.

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Invalid NVRAM Media Type

Probable Cause

Recommended Action

Problem with NVRAM (CMOS) access

Replace the system board.

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Keyboard Controller Error

Probable Cause

Recommended Action

Keyboard, I/O keyboard controller
(on system board) or mouse error

1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system board.

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Keyboard Error

Probable Cause

Recommended Action

Keyboard, I/O keyboard controller
(on system board) or mouse error

1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system board.

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Operating System Not Found

Probable Cause

Recommended Action

Operating system cannot be located on
either drive A: or C:

Run Setup.

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Parity Check 1

Probable Cause

Recommended Action

Parity error found in the system bus

1. Run Setup.
2. Replace the memory modules.
3. Replace the system board.

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Parity Check 2

Probable Cause

Recommended Action

Parity error found in the I/O bus

1. Run Setup.
2. Replace the ISA board (modem).

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Real Time Clock Error

Probable Cause

Recommended Action

Real-time clock fails BIOS test

Replace the system board.

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System Battery is Dead

Probable Cause

Recommended Action

RTC battery is dead

1. Replace the RTC battery.
2. Run Setup.

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System BIOS Shadowed

Probable Cause

Recommended Action

System BIOS copied to Shadow RAM

Replace the system board.
Status message only; no action required.

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System Cache Error

Probable Cause

Recommended Action

RAM cache failed the BIOS test

Run Setup.

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System CMOS Checksum Bad

Probable Cause

Recommended Action

CMOS is corrupted or modified incorrectly

Run Setup.

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System RAM Failed at Offset, nnn

Probable Cause

Recommended Action

System RAM failed

Replace memory modules.

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System Timer Error

Probable Cause

Recommended Action

DMA, timers, etc.

Replace the system board.

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UMB Upper Limit Segment Address nnn

Probable Cause

Recommended Action

Displays the address nnn of the upper limit
of Upper Memory Blocks, indicating released segments of the BIOS

Run Setup.
Status message only; no action required.

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Video BIOS Shadowed

Probable Cause

Recommended Action

Video BIOS successfully copied to shadow RAM

Run Setup.
Status message only; no action required.

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