Chosen Solution
While watching tv, it will shut off by itself. I have to unplug it wait a few minutes and plug it back in again, then it works again for awhile, then shuts off again. I have no idea why. I have it plugged into a power surge protector. I was gone away on vacation for 2 weeks and it was previously working fine, until I returned home. Now it shuts off by itself.
@gwilliam could be an issue with failed capacitors on the power board or over heating. Your set shuts off because it goes into protection mode. It will definitely help if you can provide the exact model number. It might also be helpful if you post some images of all of your boards inside your TV with your question. That way we can see what you see. Use this guide Adding images to an existing question for that.
If you have another device attached to your tv check the batteries on the remote, we had the same issue with a firestick after battery replacement it was fine
I just a bought a LG 55" tv real cheap as it had this same problem switching off after 10ish minutes. Took back cover off and noticed the heatsink for the graphics card part was quite hot. Put a fan against it and bingo problem gone. Terrible thermal design in the tv. I cut a hole then glued a little USB silent computer fan to the back cover (I butchered a laptop cooler stand for the fan). When the tv is turned on it powers up the fan, when tv is off, its off. So stoked!
I’ve had my LG 55” TV 2 years last night it started powering OFF every 5 seconds when I turned it On. I checked the power cable, disconnected all HDMI inputs (cable box , blu ray player and Echo Cube). This had no effect. I replaced the batteries in each remote control. When I replaced the batteries in the Echo Cube remote it stopped. The batteries in the Eco Cube remote were half dead which was causing the remote to send out power Off commands to the LG TV. The TV has been working fine ever since. I hope this helps.
Double check the fuse in the plug. Mine was a 10amp fuse, but on the plug says it was meant to be a 13amp one. So I changed it and had no problem since.
Its the temperature…ve been wondering for months why my TV keeps turning off and on. I live in dallas and it was 111° today..I noticed everytime I opened my front door the TV would shut off as soon as the heat came thru..shut thr door and get the room nice and cold again..it doesnt shut off one time…
Hi I had the same problem with two LG TVs , tried everything. I did thing of dumping the TVs and getting different make. Until I changed media sharing. It`s deferentially a network issue I removed the LG TV from my home network media sharing from PC & Laptop, so I blocked media sharing to LG TV and the TV has been perfect since.
I’ve got an older model but never had the turning off and on problem before. Was prepared for it being time for new TV but did some searching first. Sure enough, one of the batteries had exploded in one of the remotes. Changed the batteries, same problem. Took batteries out of magic eye remote to see if that would make TV work - nothing doing, put batteries back. Tried cooling TV down, dusting the back, checked the fuse in the plug. Nothing. Then decided to change the batteries in the magic eye remote - and that worked! So problem has come with a recent software update but at least I know now. Just change all the batteries!
I just had this start happening and am glad I found this thread. My Nvidia remote (which we haven’t used in a year) needed new batteries and it was close to the tv. As soon as I took them out, the tv stopped turning off and on. Such a bizarre feature!
My issue was definitely temperature-related. I eliminated all of the other variables (no Fire Stick, no remotes with low batteries, removed all cables except HDMI which I replaced with a new cable, reset TV to factory settings, tested a variety of video sources) and all it took was moving the TV away from the wall a foot or so so that air could flow behind it. Instant fix. Haven’t tried replacing the fuse yet as suggested, mainly because I couldn’t find one easily accessible (i.e. not behind the hatch that the power cable goes into.)
