So I built a budget build from old pc parts laying around my house. Computer worked fine with no issues. I gave it to my nephew and after about a couple days of him using it he accidentally hit the side of the computer with his foot. It shut off and now the monitor shows no display after turning it on. All parts inside seem to work fine with fans spinning and lights on. I wanted to know if there is a way I can fix this without taking it apart and testing each part separately.