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Hello, I am Shahid, one of the JustAnswer.com techs who is going to help you today I’m sorry to hear you're having trouble, I need the following info, please
I need the following info, please
Thanks for the model number info/ label image
Please push the Home/ Menu button on the TV remote
Does the TV show the home menu screen?
Okay, the following is a troubleshooting step that should be tried and might help
Okay, please take your time
I just checked the video, the TV goes on, flashes light blue, shuts off, and repeats the process, is that correct?
But no image/ logo appears on the screen. A normal TV should display a logo/ welcome screen then the home menu screen pops up
It seems the TV mainboard has an internal fault causing the trouble. The mainboard has a video processor chip that provides video data to the LCD screen of the TV and when the mainboard doesn't boot up fully and resets, it reboots and you see a blue flash on the screen, really sorry about that news
It needs to replace the mainboard on the TV to resolve the problem. 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 then you may please get in touch with the local TV repair shop for that work I'm sorry there is no easy or quick fix for this problem and it is a hardware failure that needs defective board replacement to resolve the issueIf you have any additional questions, feel free to ask Thanks for using JustAnswer
Very much welcome, wish you the best~
I'm afraid, I'm not in UK so please search for the TV repair shops nearby and ask for a repair estimate that will help to make a decision