Question about EliteGroup NFORCE4-A939 (NFORCE4A93910) Motherboard

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Pc bios battery faulty

The battery on the M/B does not work even a new battery would not work I need to enter bios to keep date right, what is the best I can do.?

M/B NFORCE4-939 using Win xp64 only 3 year old.
Henry Jozefowski

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  • Christoffer Petterson May 11, 2010

    have you tryed cleaning the connecting surface where the batteery sits?


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Hi there check board for bios reset normally jumpers that have to be shorted,you must also disconnect power plugs from sockets normally 24 pin and 4 pin for about minute,reset bios on board for few seconds
put bios back as it was reconnect power plugs,reboot to get into bios on screen normally hit DEL button or what your screen tells you ,enter cmocs screen change date etc and check all devices are detected then save when your finished and should boot on its own

Posted on Jan 08, 2009

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Sir, please my asus a7v400-mx time and date get missing everytime i boot my pc even when i replace a new battery. please help


Aug 13, 2013 | ASUS A7V400-MX Motherboard

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When i unplug the power cable it lost all bios settings

Hi Rahul,

The most common cause for this problem is the CMOS battery on the motherboard which is faulty or dead. The battery is there to keep the time, date and BIOS settings in tact when you unplug the PC.
You can buy a new battery at your local PC store and replace the old one. These batteries are not expensive and is worth trying.

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Hello, when I put my pc running it says CMOS checksum error press F1 to enter or Del to enter setup, but I press Del when I save changes "save and exit" the computer restarts, but this time...

The Checksum error basically shows that boot settings which were previously set has been changed or reset. This usually happens when the battery loses its charge and thus fail to retain the CMOS settings. This can also be caused by a power surge or a damaged motherboard. But most of the times it would be the battery problem.

You can try replacing the CMOS battery and enter the values back into CMOS or reset values to default. Then switch off and boot up again.
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My CPU keeps showing BIOS checksum error when booting up even i changed the battery with a new one

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it has to be the battery contacts, the motherboard is loosing contact with the battery which is why it keeps resetting itself

Jul 06, 2010 | Motherboards

1 Answer

Sometimes, when booting-up, the BIOS screen set-up

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May 02, 2009 | Intel D865GBF Motherboard

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Hi, if you're system does not keep the correct date & time it is possible the cmos/bios battery on the motherboard has reached it's max life span. The bios battery recharges only when the system is on. In many cases even when the system is on & you correct the date & time & notice the time is off the battery needs replaced.
92208a8.jpg How to replace cmos battery:

Good luck!


Aug 01, 2008 | Intel Motherboard

1 Answer

Bios problem for A7V400-MX

On this ASUS motherboard just beside the Lithium Battery for CMOS an SMD transistor needs to replaced . Sorry I can't remember the component number as well as the legend numbersince I do not have that motherboard with me anymore , but mind you IF YOU DO NOT HAVE EXPERIENCE WORKING WITH SMD COMPONENTS DO NOT ATTEMPT TO REPLACE THE TRANSISTOR AS YOU MIGHT END UP DAMAGING NEIGHBOURING COMPONENTS AND DAMAGING THE MOBO BADLY.

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1 Answer

Bios problem for A7V400-MX

Make sure that the battery contacts are good. If they are then you then are experiencing a faulty BIOS chip. try reflashing the BIOS. If this doesnt work, replace the board.

Jan 25, 2008 | ASUS A7V400-MX Motherboard

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