My sharp 70" LC-70C6600U tv will not turn off.

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Apr 8, 2018
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I literally have to unplug the tv and plug it in when I want it on. After I plug it in I can momentarily adjust the volume via the tv buttons. But, once the tv stays on for a little none of the buttons will work on the tv or remote control. The only thing I can do is change the dish channels. I believe this began giving me issues after a power interruption. Any recommendations on the correct part that needs to be replaced?
 
Apr 8, 2018
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Even though the buttons work initially on the tv when first plugged in? Your suggesting the main board replacement? No parts I may troubleshoot on the board itself?
 

velocityg4

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I did some looking. You can try a hard reset (factory reset). Not sure if it will work on your model. On the off chance someone engaged the key lock. Assuming your model supports it. Here are some methods I found for Sharp TVs. None mention your model specifically. One is the hard reset. The others are if you can access the menu.

https://itstillworks.com/reset-sharp-aquos-lc52d64u-16177.html
https://www.manualslib.com/manual/819109/Sharp-Aquos-Lc-40le820m.html?page=27

Just fair warning. If you can't change inputs. If the hard reset resets the TV but doesn't fix the problem. You may be stuck on a useless input and unable to watch any TV.
 
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