I have this plasma pn64f5500 i have a problem with main board it clicks on and off.....what i did to test if iwas rigth on the main has a problem....i intalled another main board pn60f5500 and it works it stays on i you can heard the volume clicking it means working , but no video....on the power supply. " va "and vs " i get 10v intead of 217vs and va 55 not present....i think its a main problem its not 64 but 60 any ideas