![]() Make sure the computer shuts down completely before turning off the main power by going to the Start Menu and clicking Shut Down.Īt any point, if you ever feel uncomfortable working with your computer or would rather have a trained IT professional do the repairs, you can always use TalkLocal to find a computer technician right now! We’ll connect you with up to three technicians in your area who can help you when you need it. If the computer was not shut down properly: ![]() electropapauk (242240) 97.8 positive Feedback. Learn more - eBay Money Back Guarantee - opens in a new window or tab. Get the item you ordered or get your money back. CMOS yang berfungsi untuk menyimpan data terkait BIOS dan telah dinisialisasi ulang, biasanya menyebabkan kerusakan ini. Afterwards, replace it with a new battery with the same specifications (voltage and size) and reenter the CMOS settings. Bios Battery 40mAh (CR1220W) > > ERROR 0251: System CMOS checksum bad. Kerusakan CMOS Checksum biasanya terjadi saat sistem operasi dimulai atau dinyalakan, yang berarti sistem telah dikembalikan ke pengaturan pabrik.Using the motherboard’s tech manual, locate the battery and remove it. Make sure to write down all the CMOS settings (if you lose them, you can obtain them from your computer manufacturer). Before actually making any hardware changes, reboot the computer to ensure that the error still exists. If you suspect this is the error, the battery can be easily changed. If the CMOS battery expired or isn’t functioning: Afterwards, make sure to run a virus scan to ensure that a virus didn’t cause the error and the BIOS settings are still correct. Reset the BIOS settings back to default while checking that the date and time are correct. There are usually 3 main reasons for the System CMOS checksum bad error:Īt boot, go into the BIOS screen by pressing del or F2 or the specific key combination designated by the motherboard (it should be displayed on the boot screen). However, when these two values differ, the system flags it as a CMOS Checksum error. If these two values are the same, the computer boots normally. Every time you boot up your computer, the current value is checked against the stored value to detect whether or not the BIOS was changed. However, while this error might be extremely frustrating, there are fortunately only a couple of problems that can cause this error, all of which are easily solved.Ī checksum is a value stored in the CMOS memory in order to guard your computer’s BIOS software. 0251: System CMOS checksum bad - Default configuration used Description The CMOS checksum is bad, possibly because the system was reset during a BIOS boot or because of a dead RTC battery. Carefully open the computer case and remove the old battery. If you are encountering the CMOS Checksum error on an old computer, then you should check the battery. Generally, the CMOS battery gets faulty after 5years. One of the more common errors you might encounter is the infamous System CMOS checksum error. Solution 2: Check and replace the CMOS battery CMOS uses a battery to store power after you shut down your computer. There are many errors you can get while starting up a computer.
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