Hello,
You may do these trials:
Firstly, check the heat sink to see if it is loose or not working properly.
Secondly, you’d better put the laptop on a flat and hard surface, so that heat can be dissipated better.
Thirdly, check the battery and change the unhealthy one.
If you are not a pro, you can take the laptop to a professional staff to take it apart to check the components.
You are suggested to recover the important data in advance to ensure data security.
related post: ''''''https://www.minitool.com/data-recovery/recover-data-when-pc-wont-boot.html