Help with Samsung PN58C8000 Plasma blinking ,I know there topics on this , but none very thorough and all very limited , and my screen seems the be a gem of a plasma and last thing i want is some lazy tech coming over 4 times taking my screen apart or replacing my panel when its not needed . . so basically how do i troubleshoot down problem , I have my tv hooked to a Yamaha 467 Receiver I haven't updated the flash-ware yet , and i have my sony blu ray , xbox 360 , and htpc on there all of them blink every 1 1/2 hours and the longer the tv is on the more it happens. . .