SOURCE: I have a Samsung LNT4071fx and everytime i turn it
Samsung tvs models have problems with the tv power supply board alot.That the board where the power a/c cord plug into it.Tries tv unplug,replug the tv back like about and hour later for the tv to do a resetting and a rebooting itself back to the factory setting,tv might work again.If not check the tv front bazel frame display screen panel look at the bottom of the tv for a LED power light indication lite up at all like red or green?If not all or keep flashing none stop.Than it is 100% it the tv power supply board.Must take the tv aparts and checking the tv power supply board carefully for components parts that are called Capacitors.These capacitors parts are very easily to spots if they are leaking or slowly dying.These capacitors dying are alway bulges up on to it tops,never totoally have flat tops.Now all these capacitors parts must be change to fix the tv power supply board to power up the tv again.If u have all the tools and know basic electronic works u should have no problems changing these dying capacitors parts at all.If not tries websites like Shopjimmy.com,Ebay.com to buy a new whole refurbish power supply board for the replacement.
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