Mining can't damage the computer parts unless the pc have a failed cooling fan, also if you don't know I think you deserve to know, it's not profitable to mine with pc only, that means all you can use is the CPU and CPU mining isn't worth it anymore unless you have a high end cpu like RYZEN 9 3950X
It might not directly damage your computer, but the act of running a computer for a long time has detrimental effects on your system. If you browsed on it 24/7 it would still be degrading, but having it at additional load only increases the heat that the computer generates, and the strain that the computer it put under. This usually means that components break down quicker, especially with heat. Its why thermal paste is applied to a CPU, because we already know that "normal" usage of a computer will be too hot for the CPU. That's without it performing something as resource intensive as mining. So, while it might not directly damage your computer, the fact that you're running your computer for prolonged amounts of time, at a demanding level will indirectly degrade your computer components.
