I think "Set to Default BIOS" has been tried, if not then I recommend this. Or a full BIOS reset wouldn't hurt either. If this solves your problem, if not, it is recommended to take it to a service center for repair.
The first thing I notice is that there is not enough paste between the two surfaces. What exactly is the paste you use? I can recommend the Noctua NT-H2 paste! Try that.✌️
Hi,
Check how well the paste spreads on the cooling surface. Cooler, have any changes been made? Are the screws correct? Share with us a picture of the paste surface after removing the cooler.