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Hello, my name is***** am one of the JustAnswer.com techs who is going to help you todayI’m sorry to hear you're having trouble with TVI need the following info to troubleshoot the problem;
Okay, what video device/ source is connected to the HDMI-1 input of that TV?
Okay, did you unplug the TV power cord for 10 minutes form the power socket to get it to reset, replug it back in to reboot the TV?
The Tv must display the menu screen to reset the Tv, there is no other way around, sorry
It seems the TV mainboard has got an internal failure which is causing the issue, it needs to replace the mainboard of the TV to resolve the problem
I am really sorry about this and you are going to have to return the unit to have it replaced. It will be covered by the warranty if this has not expired, and the replacement will be done at no cost to you
If the Tv is out of warranty then please Please click the following link to view the board image and part number info to search/ google it to get identical replacement board price info if you're looking to attempt to repair the TV yourself
If you are not comfortable working on it yourself then please contact the local Tv repair shops to get the repair quote
I hope this info will help. If you have any additional questions, feel free to askThanks for using JustAnswer
You can expect 100 or so Pounds repair cost
Yes, it could be under 100 or a little bit over, the local Tv repair shop will give you the exact repair estimate