Hi I'm having trouble with my screen (15 inch Samsung Syncmaster tft) randomly going into what I assume is standby mode, with a little orange flashing light instead of solid green. This is happening sometimes during boot up, and if not within about 10 minutes or so of getting into windows. Rebooting generally, but not always, makes the screen reappear for a bit, and then it goes again. I have updated my drivers, and Direct X. I have also tried running the system with my old graphics card and the same is happening, so I suspect it isnt actually the graphics system. The card I am currently using is a gigabyte geforce 6600 gt 128 mb agp. CPU 2.4ghz pentium 4. 512mb of ram DDR 400mhz DIMM ABIT IC7-G mobo. The old card I tried with is a PCI geforce FX5200 - and the same happened with it. The card isnt new, I've had it since november with no problems, this suddenly started today. I installed two new 512mb DIMMS without incident, and was playing Oblivion, when about two hours later the screen went into standby, and started going into standby on or soon after bootup every time I rebooted. I have removed each of the three DIMMS in turn and tried with them, I get the same problem with each. I've also checked fan voltages, and they seemed fine, i think about .2v below 3.3v, 5 and 12v respectively. I'm now totally baffled - I suspect mobo but any suggestions gratefully received. wicksta ps It is now consistently going into standby during bootup - I don't even get as far as Windows it seems.