Main BIOS checksum error !

[Shukla]

My pc is showing " main bios checksum error " , it even does not start in one time i have to push on button 4 to 5 times the it starts . What to do ?

 

[archer]

Hey Shukla, Try removing the CMOS battery and keep it out for 30+ mins and then insert it back. Try this first and let us know.

 

[Shukla]

I have done that but nothing happens .

 

[archer]

It seems like you tried to update the BIOS and it did not go well. If yes, Try this.

Unplug the power from PSU. Take out the CMOS battery and all unnecessary peripherals (Take out anything your PC doesn't need to boot. This includes card readers etc.). Unplug all the HDDs. Run the PC on just one RAM stick (if you have multiple RAM sticks). Only keep your keyboard plugged in.

Wait for BIOS to reset, put the battery back. Boot the machine, then go to BIOS settings, run Q-FLASH. Update the BIOS to latest version. Disable "LOAD CMOS DEFAULT".

Plug in all the devices back and then check.

 

[Shukla]

no , i never tried to update bios .

 

[bobafetthotmail]

then bios corrupted on its own. need to update the BIOS for your motherboard.

 

[archer]

As already mentioned above. BIOS is corrupted. If possible get updated BIOS file for your motherboard and update it with the steps mentioned.

 

[Shukla]

I have updated the latest bios version ( from version F1 to version F3 ) on my motherboard with the help of @BIOS utility tool. Thanks for helping.!

 

[Shukla]

it again showed that message

 

[bobafetthotmail]

Then it could be drained CMOS battery or dying PSU.

Or at least in other such cases I had the culprit was that. I hope others have better ideas.

 

[OvenMaster]

I had this same problem once when I had to keep pressing the On switch. My PSU failed, destroying my two DVD burners, and I immediately started getting BSODs that pointed to a corrupted BIOS. After I got a new PSU, I tried to clear the BIOS and update it, but my mobo maker's update software would not work because it already had the latest version. A new BIOS chip cost more than a new motherboard.

 

[Shukla]

But i have recently bought a new psu and installed it , also the cmos battery is only 5 weeks old !!!!!

 

[OvenMaster]

It is very possible that your old PSU damaged your BIOS chip.
A new PSU and a new battery will not repair a damaged BIOS chip.

 

[Shukla]

so what to do ? Buy new mobo ??

 

[OvenMaster]

Or a new BIOS chip.

 

[Shukla]

brand ?

 

[bobafetthotmail]

I would try with a new PSU first. zebronics is not a good brand. And I fixed similar issues by replacing the PSU (and reflashing the bios afterwards).

Replacing bios chip depends from your motherboard. need to google "replace bios chip <motherboard model>" and see what results come up.

 

[OvenMaster]

But i have recently bought a new psu and installed it , also the cmos battery is only 5 weeks old !!!!!

Shukla, did you have your BIOS problem BEFORE or AFTER you bought a new PSU?

I would try with a new PSU first. zebronics is not a good brand. And I fixed similar issues by replacing the PSU (and reflashing the bios afterwards).

Replacing bios chip depends from your motherboard. need to google "replace bios chip <motherboard model>" and see what results come up.

BobaFett, I'm getting the impression that Shukla is having problems after installing a new PSU.