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Hi , I`m Jack Perhaps I can help you with this problem but first could you please give me this tv`s model number ?
Thanks and a few questions here ;
Does it turn off as if you had pressed the power button or just lose the picture for example ?
Do you need to turn it back on or it does by itself ?
Do you have to wait or unplug the tv before you can turn it back on ?
Did it quit while watching it or simply would not come on today ?Any electrical storm or power blackout in your area prior to this ?
Did this problem happen all of sudden or gradually got worse over the last few days/weeks ?Like it would take longer than usual or repeated attempts before it would turn on ?
As you can see , many scenario possible here so please tell me as much as you can about the problem
O.k then and how do you get it back on ?
Does it respond to the remote ON command or you have to do it manually on the tv ?
Can you turn it right back on and this repeats ?
O.k then that is what I wanted to know thank you .
You got a defective main board I`m afraid
How do you want to proceed from here ?Look into this yourself or the repair shop ?
Let me know and i will help you along if you wish to look into repairing this yourself ,otherwise i will give you the details and costs you could expect.
Yes those insignia are actually made for bestbuy so the geek squad would be the best place to get it serviced .
Not trying , your tv is broken and I told you what was needed so please do take the time to rate my answer by clicking on the star icons at the top, then click on Submit , this is how I make a living and that rating gets me paid for my time.Also note that it will not close this post , you can come back here at any time if you have questions.
You can see that main board here ;
Its not in stock there but that will give you an idea of what you can expect for parts and the geek squad rates should be around $150 .