If the battery is several years old, it won’t be able to provide enough voltage to CMOS and this problem is bound to appear. Solution 1: Replace Your CMOS Battery One of the major causes of this problem is the CMOS battery. Once the computer powered up I again saw the same two errors as listed above. If the checksum fails, youll get an error message that says something like CMOS checksum error: Loading defaults. The CMOS checksum error is a result of abnormal power cut of the system, which can be resolved easily only by restarting Windows 10. Either way, loading BIOS defaults should be enough to resolve the problem. I had to reset the CMOS with the jumper again before it would power on correctly. After saving theses settings and restarting the computer, it again emitted one long beep and turned itself off. I tried again to enter in the correct values in the BIOS setup. I replaced the CMOS battery with a new one from Radio Shack, and still no luck. System Not Found Error How to Fix a CMOS Checksum Error Newsletter Sign. Does anyone know what could possibly be happening with my computer? the Boot Order Load BIOS Setup Defaults Flash (Update) BIOS Remove a BIOS. I then powered the computer back on only to recieve the same error messages as before and then after restarts, the same long beep and shutdown. .CMOS Checksum Error - Default loaded If your CMOS batt is ok, then try flashing your BIOS I bet your battery on the motherboard is dead. After trying a restart again, and getting the same results, I opened up my computer, set the CMOS jumper to clear, and cleared it. After the installation, as I was starting up the computer, I recieved the following error messages: “Floppy disk(s) fail 80” and “CMOS checksum error – Defaults loaded” After recieving this message I restarted the computer but all that happened was the computer powered on and emitted a long beep until it shut itself off. Today I bought a new hard drive for one of my computers and installed it.
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