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- HP Community
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- Desktop Boot and Lockup
- 27-ao21 touch wont open past hp logo screen

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07-25-2021 10:22 AM
computer suddenly stopped working-wont go past hp logo screen
tried CMOS and BIOS troubleshoots from HP website
Screen not entirely black theres a slight glow and after CMOS and BIOS troublehoots it will get to HP logo and then wont go any further. I tried the hit the windows button and V and B buttons and did get to the blue screen with the drop down menus while going through the CMOS-BIOS troubleshoots.
First screen i ran into at the very beginning was the CMOS checksum is invalid screen-restarted the computer but i cant get it to work
07-26-2021 01:11 PM
> CMOS checksum is invalid
How old is the computer?
There is a battery on the motherboard, about the size of a $0.25 coin.
When that battery runs out of juice, it no longer can supply power to the CMOS.
The stored values in the CMOS are "lost", and that causes the error-message.
After those settings are "lost", the motherboard cannot "find" the disk-drive, and thus cannot load Windows from the disk-drive.
Replacing that "button-battery" on an All-In-One computer should be done only by a computer technician.