Hullo, my comp came back from RMA after 1 million years so I turned it on. Everything worked fine even my old data/games/programs were on the hardrive so I turned it off. Took out the PSU/GPU replaced them and now I get a no signal on the monitor. Everything powers up fans start spinning etc....I need help. This new computer has been a nightmare for me. Also I replaced the old PSU/GPU and nothing there either ideas?