BIOS rom checksum error

Asus A7n8x deluxe motherboard
September 12, 2009 at 17:07:27
Specs: Windows XP
I got this motherboard with AMD Athlon processor installed on, and I got an extra AMD Sempron processor which and I wanted to replace Athlon with Sempron and after I did so, and started computer I got this borring message :

BIOS rom checksum error

Pleas help...

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September 12, 2009 at 18:06:35
First reset the BIOS to factory defaults. Save the settings and restart the computer.
Have you checked, whether the mainboard support that processor?

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September 12, 2009 at 18:25:07
I have, and it does support this processor, but question is how do I reset the BIOS? By taking the CMOS battery? 'Cause I have done that and nothing happens.. thanx

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September 12, 2009 at 23:57:59
Bios Cheksum error related to bad cmos battery.Try to find another battery.

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Related Solutions

September 13, 2009 at 07:13:55
BIOS checksum error related to changed hardware.
The BIOS checksum is build by the settings and the installed hardware. If another hardware is installed and not correctly set in the BIOS, the checksum is different and you'll get a checksum error.

The same happens, when battery gets empty.
The former known hardware informations gets lost and the standard settings are set automatically.
Plug and Play recognizes new hardware builds a checksum, compares the checksum with the checksum of BIOS settings, recognizes that they are different and you get a BIOS checksum error.

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