Trouble turning on and staying on

[GeminiBusiness]

It's me again. I sent my HP back a couple months ago and it was returned. Everything was fine-at first. The newest problems are...

One morning I had trouble starting my notebook. I had to press Power several times before it started. Moments later it turned off. I press Power and it turned on again and stayed on but not before I saw an error message on screen. That's happened a few times since then, it turning itself off after I turned it on in the morning or just randomly going dark and turning off, mostly showing the exact message after I turn it on again:

"The system has detected the storage capacity of the battery stated below to be very low. For optimal performance, this battery may need to be replaced."

Also, I'm not sure if it's related but the night before there was a noise coming from my notebook, like the sputtering of a fan. Is it the humming of the fan or the HDD spinning I'm not sure but it's way louder than normal. That's happened 3 times in the last month.

It's an HP 15-ay196nr Laptop, 15.6" Touchscreen, Intel® Core™ i7 with Windows® 10 blah, blah, blah.

Confused,

JJ

[Lil_Boy_Blue]

Hi

Initially I suspect the CMOS/RTC battery.

https://duckduckgo.com/?q=cmos%2Frtc+battery&t=brave&ia=shopping

Usually good for several years, but what do I know?

[GeminiBusiness]

Thank you, the CMOS/RTC battery is a start.