CMOS reset everytime I boot up

phoenix061992 · Aug 22, 2016

I upgraded my pc the day before yesterday.Bought MSI B150m MORTAR motherboard. But whenever I boot up the CMOS gets reset everytime. I then manually have to select my boot drive from bios and then it starts.... Please help

CircuitDaemon · Aug 22, 2016

Just replace the battery on the motherboard, they cost like 2~3USD. It shouldn't be depleted yet as it's a fairly new motherboard, but that's the most likely cause.

boosted1g · Aug 22, 2016

Could also be that the battery is just loose in the slot.

phoenix061992 · Aug 22, 2016

boosted1g :

Will try to tighten the battery and see the results.....

phoenix061992 · Aug 22, 2016

boosted1g :

But i just bought the motherboard the day before yesterday.... Are you certain that the battery is creating the problem :/?

Grugbug · Aug 22, 2016

Are you saving your settings before exit?

scuzzycard · Aug 22, 2016

phoenix061992 :

It could if the battery sat in a warehouse for a couple of years before it made it onto the motherboard.

Kurz · Aug 22, 2016

Also there might be a problem with your Powersupply... The powersupply should be providing phantom power to the motherboard to keep the clock and bios powered. If your computer is on a lightswitch circuit you should change that.

phoenix061992 · Aug 22, 2016

Grugbug :

Yes saving my settings before exit

phoenix061992 · Aug 22, 2016

Kurz :

I had a fx 8350 and GTX 970 running well with the powersupply i have.... I dont think that the power supply is an issue

phoenix061992 · Aug 22, 2016

scuzzycard :

phoenix061992 :

It could if the battery sat in a warehouse for a couple of years before it made it onto the motherboard.

Will changing the battery void the warranty of the motherboard?

scuzzycard · Aug 22, 2016

phoenix061992 :

scuzzycard :

Will changing the battery void the warranty of the motherboard?

No way, the battery is considered user-serviceable as long as it's installed in a socket

CircuitDaemon · Aug 22, 2016

As someone already said, the battery could be long dead even before being installed into the motherboard. Just give it a shot.

bloodroses · Aug 22, 2016

Your motherboard have a bios reset jumper on it. I'd check that first to make sure it's not on the reset position before replacing the battery.
http://www.manualbirds.com/manuals/msi-b150m-mortar-handbook-675437-29

JBAT1: Clear CMOS (Reset BIOS) Jumper in the documentation

Kurz · Aug 22, 2016

Just saying if the Powersupply doesn't provide the power needed while its off then the new battery might just as fast.

scuzzycard · Aug 22, 2016

Kurz :

It would still take years for the battery to fail. Back in the 80s and 90s, we had AT power supplies that didn't supply any current at all when the machine was off, and the batteries still lasted for years.

CircuitDaemon · Aug 22, 2016

You'd be surprised by how common this new batteries don't have much charge left. I've seen this happen more the past two years than in the past 10 years I've worked with computers.

phoenix061992 · Aug 23, 2016

changed the battery but no luck with it

BestAdvice · Aug 23, 2016

Try with updating BIOS to latest version.
If this does not work then it could be battery leakage problem only.

phoenix061992 · Aug 23, 2016

BestAdvice :

updated still the same :'(

CMOS reset everytime I boot up

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