was watching tv , had a power loss at home, when power restored set came on for 30 secs then powers down, immediately tries to come back on and does, for 5 seconds then drops again repeating the 5 sec. interval of starting and stopping. I have to pull the plug to stop this. when the tv does come on, after plug is reinstalled , it works fine but lasts only 30 secs. then the 5 second interval starts. the set was plugged into a surge suppressor. I poked around a bit, No visual clues on power board or other board with the capacitors. Any ideas ? thank you