Chosen Solution

The laptop does not start and gets heated on the left rear side upon charging.

You could try to clean the dust and replace your thermal paste. Overheating is the most common issue for laptops when they boot and shut down after a while. Although in desktops it’s quite easy to clean the dust and re-apply thermal paste, in laptops it’s a bit harder. If you don’t know how to disassemble it, it could become really troublesome.