This is my first week with DCS A10. I can not figure out why my monitor  starts to black out for 4 to 8 seconds while in-game. It blacks out then  flashes the in-game view for about a half sec then goes black again. If  I minimize the sim, the desktop is normal- no flashing. The flashing  starts a few minutes into a training mission or instant action. The  in-game video settings are on low. I have a 28 inch LCD monitor. If I  swap the 28 inch monitor out with a 24 inch monitor the flashing stops,  even if I increase the video settings to high. I don't have any problem  with the 28 inch monitor in other graphic intensive sims, like ARMAII.  Any suggestions are certainly welcome. I suspect the 28" monitor is the problem but I hesitate to buy a replacement to only find the problem is else wheres. Has anyone else experienced this type of black out?   
My system: WinXP Pro 32bit  sp3, AMD X4 975 @ stock 3.60, 4Gb DDR3- using 3GB switch in boot.ini,  GeForce GTX 580 w/1536 MB, newest signed drivers.