P2412H, black screen

Hello,

This monitor has been driving me crazy. I got it for free from work and they were having issues with it as well. Basically when I turn the monitor on, whether it is connected via the DVI cable to my PC or not, it will only momentarily display the screen before it goes almost completely black. If you look very closely, you can see the display. I ordered a new power supply board and installed it, and it was working for 3 days. I wen to power up my machine today and it went back to it's old ways. I saw an old post where someone took it apart and made sure all the capacitors were aligned vertically and then it worked. I've tried this with no success. None of the capacitors appear to be bulging so I don't think that's the issue. I've just about had it with this monitor. Is there anything else I should try before calling it quits?