I had this problem once before and i had it serviced i think they changed the main board but not sure and now its starting again and ide like to try to fix myself. i am experienced in electronics and am not afraid of alittle soldering.
well the problem is simple. when i plug the power in and leave the tv on for about an hour it will start changing channels by itself. i checked and it is not the remote control.
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The buttons themselves might be defective but it is very unlikely that all of them would become defective at the same time.
I would suggest to open the TV and check for any loose connections between the main board and the buttons board assembly.
Let me know if you need further assistance.
Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
please go to the manufactures website and ask for a service manual and follow the guide to help you but I would stay away from the electrical circuits if you are not familiar with the ins and outs of theses electrical circuits as the AC mains circuits are lethal to the everyday person without electrical knowledge eric
Do a reset to this TV, and then check. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Unfortunately, both the local controls and the remote are controlling an integrated circuit on the main board that does the actual work.
I think you can expect to have the main board replaced or exchanged and this won't be cheap if available at all.
I think this company is related to the infamous 'Ilo' that was once sold by Mall-wart.
They were bankrupt but the leftovers may still be available.