is the power at receptical ok? is there any lights on the front? if so unplug tv for 1 hour and then retry. if still no work, could be a bad H.O.T., power supply, flyback,solder connection, etc.
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I would suggest that you take that unit to a repair shop that has been recommended to you by word of mouth by your friends,relatives,co-workers or neighbours as that is the proper way to find an honest and qualified tech,they may be an authorized shop for that brand or they may not,they may be a store front or home based but they would be qualified to fix it as stated by the many notices manufacturers place on the back of their equipment for customers to read and respect.
If you attempt to repair the item yourself you will definetely not fix it but instead create more problems,a risk of fire and personal injury and afterwards a lawyer will come to you and tell you "lets sue this tech for $XXX XXX as it won't cost you a nickle or a dime,you penny pincher,spend thrift,nickle & dimer,low baller,cheapskate,tightwad,freeloader,toe picker and hustler" and the lawyer would screw you just like a car mechanic and the only thing you would get out of it is a free jar of vaseline and a pillow.
Finally it takes years of formal training to acquire this knowledge usually by community college/vocational school (some by correspondense courses or the like) as well as training afterwards by manufacturers or from everyday personal experience working on stuff combined with expensive dedicated test equipment,service manuals and in some cases repair tips that we share through the internet.
In plain English:
take it to a repair shop as we have to make a living just like you" also if it was just cleaning,a loose wire,or a burnt fuse we would be rich.By way that tech that replies to customers on this site should stop even if it requires sacrificing his dominating authority and attention whoring.
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