-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
- HP Community
- Desktops
- Desktop Operating Systems and Recovery
- CMOS checksum is invalid

Create an account on the HP Community to personalize your profile and ask a question
07-26-2020 07:42 PM
i just purchased an adapter for this hp notebook and when pressing and holding the power button...It will light up and then turn off. But sometimes the power led stays on but the computer screen remains blank then a message appears that says the following:
THE CMOS CHECKSUM IS INVALID. THE CMOS WILL BE RESET TO THE DEFAULT CONFIGURATION AND WILL BE REBOOTED. PLEASE CHECK SETUP OPTIONS TO SEE IF THEY CHANGE.
CMOS RESET (502)
enter-reboot the system
and then the message disappears and back to a black screen. I do not hear anything when the power led turns on.
07-29-2020 08:36 AM
Welcome to HP Community
I have gone through your Post and would like to help
Try restoring the BIOS back to default and check if that helps
-
Turn off the computer and wait five seconds.
-
Press the Power button to start the computer and repeatedly press the F10 key to enter the BIOS setup menu.
-
On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
-
Press F10 to Save and Exit.
-
Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
-
Follow the prompts to restart your computer.
Keep me posted
Thank you
If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.
KrazyToad
I Am An HP Employee