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Hi there and welcome to Just Answer, my name is Richard and I look forward to helping you.
I’m sorry to hear you're having trouble with your TV. I know that can be frustrating. Hopefully, we can get this resolved quickly.
Please note, a rating is only needed when we are finished.
Can you please remove the power to the TV (so unplug it from the power socket).
Then wait 10 minutes, connect the power again to the TV, turn it on and tell me please if it is now operating correctly.
Let me know the results please
Can you disconnect everything from the TV, so cable box, Bluray player, Antenna ect
Then connect only the power, power it on and tell me how it then functions please
I am sorry to hear that.
It is the internal mainboard as the most common cause that has faulted with these symtoms.
I am really sorry about this and you are going to have to return the TV to have this replaced. It will be covered by the warranty if this has not expired, and the replacement will be done at no cost to you.
I am really sorry about this, and if you have problems, or would like any additional information or assistance, please do not hesitate to let me know.
I understand, what is your location?
You can call the TV repair center on 01865 920800
They can then come and test each component, it is nearly always the mainboard but this needs to be ruled out to see if the power board is the issue, which from your symptoms it does not look like being.
You are welcome