Does anyone know why my t.v keeps turning off then repeatedly trying to turn back on? I can hear the power board clicking on then off like it's trying to turn on but screen remains black. I unplugged the power cord from the t.v and the cord running to outlet and left it like that for a few days to see if it would reset itself. I turned it on today and it worked just fine for about an hour so. I thought it was fine so I turned it off thinking it would be fine. I just got home and tried to turn it on but the same thing as before happened again. I'm thinking it's the power board but I'm not sure. Can anyone please help and is it worth fixing?