How do I fix main BIOS checksum error?
How to Fix CMOS Checksum Errors
- Restart the computer. A normal restart usually creates a new checksum and eliminates the error.
- Download and flash a BIOS update. Download the update from the motherboard manufacturer’s website.
- Reset the BIOS.
- Replace the CMOS battery.
- Consult a technician or computer repair expert.
What causes checksum error?
You’ll get the “CMOS Checksum Bad” error on your PC if values in the CMOS memory are corrupt. This could be due to installing an incorrect or corrupt BIOS update. The CMOS itself is powered by a dedicated battery, so you might also get the CMOS checksum error if the CMOS battery is weak, bad, or old.
What is CMOS checksum error defaults loaded?
CMOS checksum error – Defaults loaded Checksum of CMOS is incorrect, so the system loads the default equipment configuration. A checksum error may indicate that CMOS has become corrupt. This error may have been caused by a weak battery. Check the battery and replace if necessary.
How do I fix a checksum error?
How can I fix the checksum error in WinRAR file?
- Try WinZip. There are many tools out there for compressing and sharing large files.
- Select the Broken files check box. Right-click on the compressed RAR file.
- Repair the corrupt RAR files.
- Uninstall and reinstall WinRAR.
- Redownload the RAR file.
- Check your Antivirus software.
How do you resolve a checksum error?
How do I extract a corrupt RAR file?
Open the WinRAR Program. Then from the File Menu just select Open Archive and locate the corrupt RAR file and click Open. Click to Extract To button and then check the box named Keep Broken Files and then select the Save Settings option.
What does System CMOS checksum bad mean?
CMOS checksum is bad, possibly because the system was reset during BIOS boot or because of a dead RTC battery. Corrective action. Reboot the system. If the problem persists, replace the RTC battery.
How do I check for BIOS problems?
Check Your BIOS Version by Using the System Information Panel. You can also find your BIOS’s version number in the System Information window. On Windows 7, 8, or 10, hit Windows+R, type “msinfo32” into the Run box, and then hit Enter. The BIOS version number is displayed on the System Summary pane.
What should I do if I get a BIOS checksum error?
The first thing you need to do in order to fix a BIOS checksum error is to determine its cause, and if you’ve read the previous paragraph, you should already have a pretty good idea what triggered the error. In most cases, fixing a BIOS checksum error is a straightforward process that only takes a few minutes to complete.
What to do if your main BIOS has become corrupted?
Re: Main BIOS Checksum Error! A little more information on your sytem wouldn’t go amiss for a starters. Try removing al the RAM apart from a single stick in the first slot. Re: Main BIOS Checksum Error! from your description it would seem that the main BIOS has become corrupted and it is reverting to the back-up BIOS.
What to do if your BIOS is not accessible?
Simply access the BIOS and select the “Load Defaults” option. If your BIOS is not accessible anymore, you can perform a hardware reset by using the “Clear CMOS” jumper on the motherboard. Refer to your motherboard’s manual for instructions on how to perform this operation.
How is the boot code executed on a BIOS?
Before the boot code in the BIOS is executed, though, the BIOS data is checked for authenticity by comparing one of its values, known as a checksum, against a value stored in a memory chip called CMOS; if the values match, it means that everything is working correctly, so the boot code is executed and the computer starts normally.