When I wake my computer from sleep or suspend to ram, the screen lights up for a quarter of a second, then goes dark for 4, and repeats for up to several minutes before staying on. When the screen [samsung syncmaster 206bw, DVI connection] is in sleep mode, the light around the power button blinks off and on, and I realized today that the screen flashes on when this light turns on.

Other computer info
Dell Desktop computer
Processors - 4x Intel Core i5-3450 @3.10 GHz
Memory - 7.8 GB
Graphics - 4.6.0 NVIDIA 390.138 [GeForce GT 620/PCIe/SSE2]

Thanks!!!