Hey guys, I've been having this problem for months, it's really got me foxed. Specs: CPU: Intel Core 2 Duo E8400 (not overclocked) Motherboard: Asus P5Q Pro RAM: 2GB OCZ DDR2-1066 Graphics card: Gainward NVIDIA GTX 260 OS: Windows XP (32 bit) SP2 My computer ran fine for over a year after I built it, then without any apparent major change in configuration, this problem started. When I first boot, nine times out of ten, the monitor picks up no input. The monitor light just flashes as if the monitor is unplugged (of course, it isn't). Apart from that, there's no indication that the system isn't booting normally. Pressing buttons on the monitor still brings up a sign saying 'test OK'. After what seems to be an initial decisive few seconds at the start of boot, if it does pick up input, it then runs fine with no other issues until I shut it down again. I've replaced the VGA cable and VGA-DVI converter that I use to connect my monitor and I've tried switching out the graphics card with one that is known to work in other systems, and the problem still persists. The next stage I'm considering is buying a new motherboard, but it's a bit of an expense and hassle, so I thought I'd see if anybody had any other ideas first.