Call Samsung Corporation,if u want to.Samsung might,might not help u.They only warrenty tv parts and labors are only 1 year though.The tv problems u discribing are 90-95% it is the tv power supply board problems and it is the causes.That the tv board that where the tv power a/c cord plug into it.If the Samsung Corporation will help u that great.If not.U must take the tv aparts and must check the tv power supply board carefully for to be sure that the tv causes and problems.100% for sure,it is the tv power supply board it is the problems and the causes,if ur tv power supply board have dying and leaking capacitors components parts.These capacitors components parts are the causes and problems and not helping tv to power up any more,if capacitors components parts are bulging up or puffing up onto it tops.If u have all the tools and known basic electronic?Yes? The tv power supply board must have be change all these leaking and dying capacitors components?Or tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv power supply board for the replacement.
Its possibly dry joints on the power supply-the heat generated causes the solder to crack,and when warm creates a "crater" on the affected joint and expands with heat,and loses contact until cool.(retraction).should be easy if you are handy with a soldering iron!.failing that,take it to a repair shop as its out of warranty,and samsung will not want to know! (unless you got extended warranty,of course!)
good luck,steve
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