United States    
COMPAQ STORE | PRODUCTS | SERVICES | SUPPORT | CONTACT US | SEARCH
 

Maintenance & Service Guide
Presario 5700 Series Personal Computers
Models: 5710, 5711, 5712, 5714, 5715, 5716, 5717, 5718, 5721,
5722, 5724, 5726, 5728, 5733, 5735, 5736, 5738, 5745 and  5746

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


POST (Power-On Self-Test) Error Messages

An error message displays if the POST encounters a problem. This self-test will run automatically each time the system is powered on. The self-test will check all assemblies within the computer and report any errors found.

Click on the desired error code for the probable cause of the error and a recommended course of action.

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.

Back to Top

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.

Back to Top

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.

Back to Top

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.

Back to Top

Fixed Disk Controller Failure

Probable Cause Recommended Action
Hard drive is not working or configured properly 1. Run Setup.
2. Replace the system board.

Back to Top

Incorrect Drive A Type

Probable Cause Recommended Action
Type of diskette drive A: not correctly identified 1. Run Setup.
2. Replace the diskette drive.

Back to Top

Invalid NVRAM Media Type

Probable Cause Recommended Action
Problem with NVRAM (CMOS) access Replace the system board.

Back to Top

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.

Back to Top

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.

Back to Top

Operating System Not Found

Probable Cause Recommended Action
Operating system cannot be located on
either drive A: or C:
Run Setup.

Back to Top

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.

Back to Top

Parity Check 2

Probable Cause Recommended Action
Parity error found in the I/O bus 1. Run Setup.
2. Replace the ISA board (modem).

Back to Top

Real Time Clock Error

Probable Cause Recommended Action
Real-time clock fails BIOS test Replace the system board.

Back to Top

System Battery is Dead

Probable Cause Recommended Action
RTC battery is dead 1. Replace the RTC battery.
2. Run Setup.

Back to Top

System BIOS Shadowed

Probable Cause Recommended Action
System BIOS copied to Shadow RAM Replace the system board.
Status message only; no action required.

Back to Top

System Cache Error

Probable Cause Recommended Action
RAM cache failed the BIOS test Run Setup.

Back to Top

System CMOS Checksum Bad

Probable Cause Recommended Action
CMOS is corrupted or modified incorrectly Run Setup.

Back to Top

System RAM Failed at Offset, nnn

Probable Cause Recommended Action
System RAM failed Replace memory modules.

Back to Top

System Timer Error

Probable Cause Recommended Action
DMA, timers, etc. Replace the system board.

Back to Top

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.

Back to Top

Video BIOS Shadowed

Probable Cause Recommended Action
Video BIOS successfully copied to shadow RAM Run Setup.
Status message only; no action required.

Back to Top

 

 

1.800.AT.COMPAQ
 
privacy and legal statement