So this suddenly and randomly started happening. I would be browsing the web or playing a game and then the screen goes black with the message popping up; power save mode. Nothing I do will wake it up and I have to hold the start button for the pc to turn off (after which I can start it again and get the monitor to turn back on). It happens at the most random moments, right after booting or while browsing or starting a game. There is no rhyme or reason to it, neither is there a certain time attached to it. A quick browse online shows the cable being the cuplrit, the screen, the gfx or even the psu. What do you guys reckon? I have a different videocard here so I'll try that and let you know.