Hello
Your TVs front control buttons are inoperative except menu button. There are microswiches fitted inside the main board of your tv from which shafts ar extented towars the front of the cabin where you press to access the functions. Replace all the micro swiches inside at onetime. It won't cost more. Micro swiches as they have said is mini swiches, which can get damaged easly with high pressure thumb or impact put on it.
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