Chosen Solution
My 42” LG tv recently started switching off and on continuously I’m in the uk it’s rarley hot over here so it’s not a temperature issue I’ve unplugged waited for 30 seconds then plugged it back in and the same issue accures, after leaving it for a day I switched the tv back on and after a few minutes of watching tv it happens again switches itself on and off continuously. It’s a nice tv only had it for 2 years and I don’t want to have to scrap it so any solutions please let me know ASAP. Update (07/03/2019) The model is 42pj350-za when I switch the tv on there is a click sound indicating that the tv has been switched on and when I switch it off I hear the same sound so what happens is after a few minutes of the tv been turned on the tv switches off I know this because I hear the click sound and then I hear another click sound of the tv trying to turn back on at this point the tv stays dark while it’s still clicking continuously. I haven’t taken the back out just encase I do more damage I just rang LG and they said it’s the motherboard something about not enough power getting to it.
Kas Mk don’t scrap it yet! First, let us know the exact model of this TV. After that, explain in detail what you mean by turning itself on and off. It powers down and then powers back on? Or is it just the screen that goes dark, comes back on, goes dark again. LG has issues with the backlight array. That can manifest itself with the screen turning on, off, on etc. If it powers down and then back up you need to check the power board as well as the IR board etc. We can most likely give you more information once you supply us with more details. If you have already removed the back from your TV post some good pictures of your boards as well as the interconnect cables etc. Post those with your question. Adding images to an existing question Update (07/03/2019) This”they said it’s the motherboard, something about not enough power getting to it” is why you need to take a look. You cannot hurt the TV by removing the back :-) We will need to see your boards in order to visually check it and to provide you with some ideas on where to test. I am leaning toward a bad power board based on the symptoms, but we will have to verify this.
