Screen is white, works after a while but then goes...

Question

the screen stays white for a while and after about 20 minutes it will turn on but goes out again shortly after. i think its the power supply but i also heard it could be the control module. i just need to know whats wrong and where its located in the tv. i can fix it myself im sure. oh, and a piece on the power supply makes noise at first. its in between 2 aluminum plates(i think its the fuse. never seen it before. the sound fades too.