Electronics Repair Questions? Ask an Electronics Technician
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Sorry you're having problems. Offhand these symptoms are caused by a premature fault of a specific board within the TV- and generally requires replacement of this board to fix the issue.
However it's worth it to try a hard reset, as sometimes the processor in the TV can simply have locked up.
The first thing you would try, is disconnect the set from power, then press and hold the power button on the TV itself (not the remote), for 10 seconds and release. Then plug the set back in, and also check that the power cord is connected tight at the TV as well. Press power once, and see if the set powers up normally. Try this procedure up to 2 times, and please let me know what happens.
Are you at the TV and able to try those steps?
Please standby as I believe there is a button located on one of the lower rear corners.
On the lower left hand side of the TV's bezel, is there a half-wheel button (not visible from the front)?
Okay good, yes push it directly in to enact the power button and let me know what happens please.
Thank you and I'm sorry to hear that. Unfortunately the TV cycling on and off like this is an internal failure. The Mainboard in the TV is faulty (this board provides the turn on/off command and is the only part that can cause this) and the Mainboard needs to be replaced. If you're a DIY type then the board can typically be located as used/pulled TV parts suppliers for around $125 and is a plug and play part (meaning no soldering or special tools are needed to replace it. Alternatively at a shop this is generally in the $250 range parts and labor to replace the Mainboard. What I would try as a last ditch effort is to leave the TV unplugged for an hour or more (overnight is best) in the hopes the processor reboots- but beyond this, the TV does need the Mainboard replaced.
I understand and this is beyond anything I can control. We see this issue rampantly from many manufacturers these days and these TV's are built more cheaply than ever. JVC, Hitachi, Sharp, etc. are all designed to fit a price point and not for longterm reliability I'm afraid. We see this issue much less with reputable brands such as LG and Samsung.
Hello and welcome to Just Answer, an independent paid-support site. My name is ***** ***** I'll be taking over this question. Do you have the TV connected to the internet when you use Freeview?
Okay, I have been seeing a lot of questions about this over the past 24 hours so there is definitely something up. Disconnecting the TV from the router seems to be correcting the problem for people. Why don't you give that a try and let me know if it stops the TV from turning on and off.
It's possible. I think I can say with confidence that this is not a problem with the TV. It is, or was, an issue with Freeview because I have been seeing questions about TVs from different manufacturers exhibiting the same behavior.
Does the information I've provided above, provide an answer your question? If so, we have an unusual situation here, so if you would like the "credit" to go to me rather than the first expert, you will need to say so explicitly in chat. Or you'll need to re-rate the question if you are able to. Or contact***@******.*** and let them know you would like me to get the credit for helping you.
I understand, it's a puzzling problem for sure.