Checksum issue detected on my laptop when the battery is low.
Checksum issue detected on my laptop when the battery is low.
I have an HP 15s with the same issue as this thread.
The CMOS checksum is always invalid when I leave my laptop overnight with about 40% battery remaining.
Even after replacing the battery, the laptop won't start and doesn't show the red battery warning light.
When I plug it in, it starts but the CMOS checksum is still invalid.
Have you considered swapping the CMOS battery in your laptop, as recommended in the discussion? After several years, they tend to require replacement. Search for a CR2032 with a trailing black or red wire ending in a tiny white connector. It could be soldered directly onto the motherboard.
If you possess a multimeter, verify the CR2032 voltage. A brand new unit should read approximately 3.25V. If it drops below around 2.5V, replace it immediately. A reading under 1.0V likely means the BIOS settings—such as boot drive and time/date—will be lost.