this system im working on before the image just went away on them when they were using it. Screen just went black. I took it tried to figure it out, figured it was a dead card. Got the new card today and screen is still not getting signal. I am hearing a high pitch sound very slightly from the system, I think there might be a power supply issue. All the fans and stuff come on but no video with a working video card and monitor. What should I do next? I think the PSU is bad because the high pitch sound seems like its coming from a capacitor or coil in the PSU.