When starting the system, it will perform the checksum test of the BIOS.
If the test is not success, you might get stuck onthe CMOS checksum is invalidscreen.
Luckily, you could get some useful fixes in this post fromMiniTool Website.
The CMOS Checksum Is Invalid.
The complete warning pop-up is listed as follows:
The CMOS checksum is invalid.
The CMOS will be reset to the default configuration, and the computer will restart.
Afterwards, yo check the BIOS Setup options to see if they can change.
If you are experiencing the same issue, scroll down to find more details.
How to Fix CMOS Reset 502 Error on HP Computer?
Power off your box and remove the side panel to reach the motherboard.
Press the lock located on the side of the CMOS battery socket to remove the battery.
Step 3. find out if the positive side of the battery faces up and then reseat the CMOS battery.
If it doesnt do a trick, you’ve got the option to replace another battery.
Heres how to perform an automatic repair to fixthe CMOS checksum is invalid:
Step 1.
Laptop stuck on Preparing Automatic Repair during startup?
Read this post and find out how to effectively solve this issue.
In this case, you’ve got the option to recover the BIOS using a USB drive.
When you seethe CMOS checksum is invalidscreen on your HP computer, pressEnterto reset your system.
Heres a video guide on that:
For this, you will need a working computer.
If you fail to restore the BIOS, ping the HP support team.
Power off your gear.
If yours is a laptop, connect it to the charger after turning it off.
After that, press & holdWin+Band thepowerbutton for up to 3 seconds.
Release the power button and keep holding theWin+B.
When you hear a beeping sound, release theWin+B.
After a while, you should see the BIOS update screen.
If not, repeat the steps above again.
Then the BIOS will update automatically.
It is really worth a shot!
MiniTool ShadowMaker TrialClick to Download100%Clean & Safe
