TV will not turn on ! When switched to "on " either via TV button or TV remote , on light comes on for an instant & then TV goes back to off mode . This issue has been intermittent for approximately 1 year . The last time it remained " on " for viewing was June of 2014 . Once it was turn off , it will not turn on again . ?????? Model # PS-3227P . Lot # 136539 XHT 072072 . Manuf.' Oct., 2007 .