I have a sharp Aquos 64inch tv power cyles the screen does come on for about 3 seconds then it turns off both the green power led and the green opc led are on it blinks twice tougther then repeats itself no other flashes I have tried repeadly holding the volumn down and power as well as channel up volumn down to rest the device ?? Doesn't seem to have any change or affect it in any way ? I think I need a main board but idk for sure ? I been reading forums have learned alot about this tv but nothing I have found seems to work or change it ???? Anyone else have this same problem ?? How or what do I check I haven't ever worked on tvs or circuit boards but I am more than willing to give it a shot can't be much worse than working in a dealership in the automott industry since 1995 currently not working ?¿ Would like to repair this tv