I have received the same message several times over the past few weeks on my HP Stream 7 tablet. When I am on the internet, the screen will go black. I either have to force it to shut down or restart by pressing the power button for a few seconds. Sometimes this works, most of the time it does not. Even though the battery reading is 70% or greater, I will plug the tablet into the wall charger and then that is when the CHOS check sum invalid ..... message appears on the screen and then the screen goes black. I replug my tablet into the wall charger and it proceeds to charge but never fully reaches 90%. I have not downloaded any programs lately and visit the same non-malicious sites using the Google Chrome search engine. Help, if this continues, I will have to start using my Amazon Fire tablet.
@jenncm Thank you for posting on the HP Support Community.
I appreciate your efforts to try and resolve the issue. As you've performed relevant troubleshooting steps and the issue persists.
I would request you to reach out to our Support and our Support Engineers should be able to check the available service options in order to diagnose the computer physically. HP Support can be reached by clicking on the following link: www.hp.com/contacthp/
Please feel free to contact us here anytime you need any further assistance. Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.