Here is one for spares, or use this one and use yours for spares. It will keep you going for another 30 years.
https://www.ebay.com/itm/265132715481
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I would guess it is either overheating, or someone has a Samsung next door and your remotes are the same. :>/
For overheating, go around the back and side vents with a vacuum cleaner with the small brush attachment on it.
Your EEPROM has some bad files on it. It's an expensive IC to chance if you have the equipment and knowledge to replace it, other option is replace the main board
no there is no magic button, I would replace battery and if that did not work buy a universal remote or Toshiba remote. they are readily available on line.
The power supply system inside the set is faulty. You haven't mentioned the model number of the device here, so no body could answer you. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes are given with illustrations. You can get an idea about the fault to an extent.
Anyway, the fault should be it its main power supply board.
Tuning drift is the fault. you should check all the system control voltages to locate the fault. It is a skilled work. Contact any service technician. If you wish to get some details; check the sites linked here.
https://elektrotricks.blogspot.com/https://electronicshelponline.blogspot.com/
Search the site by type in the Brand Name of your set, in its search bar at the right side column, and press enter. See it in by Webview with mobile or by desktop