So recently my mobo reached its lifespan and I thought it was my PS. I had a old mobo (works but defective) to test my PSU with. When I would boot up the CPU fan would spin but then stop after a few seconds. Is this a sign that my PSU is dying or that my PSU just doesn't like defective mobos?
Note: It doesn't do this with a different PS.
If it works with a different PSU points to the other one to be faulty.