Hello and Welcome. My name is ***** ***** I'll assist you today. I'm sorry you're having trouble with it. Please reply back when you're ready to proceed.
Sorry for delayed reply, I was away from computer.
How old is the TV and how long it have had the problem?
Thanks Morris for the info.
Does TV show normal picture when it works properly?
Any picture distortion occurs before the TV goes Off/ lose picture etc?
OK, one more question, what other video devices/ sources connected to TV aside an aerial and does the problem occur on all video input sources of TV?
OK, lets try easy thing first. Unplug TV and TVO box power cord from wall outlet for 10 minutes to reset, replug back in, turn them On to reboot and check.
If problem persist then I'm afraid it would be hardware related issue and either power supply board of TV isn't providing correct volts and causing the problem OR main board of TV is failing that resets it so it goes to default input (TV) source.
It needs further troubleshooting with voltmeter to check power supply board output volts which will help to determine what board is bad to get it replaced. I trust my input will help you out. Please feel free to respond if you have any additional questions.A positive rating to answer would be greatly appreciated, please click on 5 star on this page then click submit/finish button so I can get credit on website for my work. If you don't see rating option then intimate here.Regards,Shahid.
You're welcome Morris. Please feel free to respond if you have any follow up questions.
Thanks and good luck~