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Re: Pc bios battery faulty
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
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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.
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.
Hope this works. Good Luck.
The motherboard battery is dead. Look on the board for a silver disk about 1/2 inch in diameter, that is the motherboard battery. It is usually held in place by a small spring affair and is easily removed and replaced, your local pharmacy or watch maker should have new ones in stock.
Either the battery which has been replaced is faulty else it is not seated properly. Also after replacing the battery, clear the BIOS and then re-enter the settings starting with default settings and then changing it as required. If the battery was to work then this loss of date & Time won't happen every time. Also look for the Jumper meant for flashing the BIOS, I hope it is in its correct position............sodeep
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.
How to replace cmos battery: http://www.computerhope.com/issues/ch000239.htm
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.