Viruses and hardware

This may seem like a silly question but I just want to get support from the outside.

I have a user who was told that his system had a virus and now needs to replace the motherboard.
In my seven/eight years of being in IT I have yet to hear of a virus that can attack hardware. Yet he doesn’t believe me.
I told him a virus is a software program/macro and cannot harm the hardware (outside of corrupting the harddrive but not physically harming it).
Any websites that anyone knows I can reference?