My Samsung HDTV takes almost a half hour to turn on. I push the on/off button and nothing seems to happen. I do have the TV connected to cable but even when I use the Samsung remote or the button on the side of the TV, it takes too long to turn on. My model is LN40A550P3FXZA, serial ALXR3CSQ502041W. I would appreciate some assistance. Thanks

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Tv have a power supply board problems.That the board where the tv power a/c cord plug into it.Take the tv aparts and check the tv power supply board carefully for dying and leaking components parts that are calling capacitors parts these capacitors parts are most likely bugles ups or puffing up onto it tops and leaking.These capacitors parts are dying and leaking that why it give the tv power supply board low power and long time to power up the tv.Have all the tools and know basic electronic also can do basic soldering work?Yes,than changes all these dying and leakages bulges ups capacitors components parts with the same Miro Fared and thoes voltages on the capaictors parts like 5 or 10 volts higher than those capacitors parts was in the power supply board u are replacing,these 5 or 10 volts higher rating will help these newly replace capacitors parts withstand heat better and last longer and the operation on the tv power supply board.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv power suply board for the replacement.