HP Pavilion shutdown problems

I'm not sure if this is the correct board, but I'll just post here for now.

The model is a HP Pavilion 15-n278sa

My laptop shuts down randomly when it is clearly completely cool, when it has shutdown, the power button will not respond, and the laptop will flash on, and shutdown immediately if it is moved/picked up/tilted, while it is off.

The laptop is increasingly getting more unstable and I'm unable to use it, please may I have some help.

Thanks