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Change horizontal driver buffer transistor's and capacitor's. 7461 7463 transistor's. Caps 2455 2405 near transistor's.
Please leave your email address, I will try to find the service manual for you.
most inexpensive universal remotes will not operate input select functions. save yourself some hedaches, go to shopjimmy.com, enter yuor model# and buy an original remote, my dear! you'll thank me later! :) mch
It sounds more like a problem with the TV, than the remotes. It's possible that the IR reciever or microprocessor for it have pooped out. It's something that would have to be serviced by a shop, but due to the age and size it would likely be cheaper to replace the whole TV.
From your description of the problem, there seems to be a Cold solder in the Vertical Oscillator or Deflection Coil circuits. If you know Solid State electronics, and are good with a soldering Iron, sure u can do this yourself. U
gotta trace the Vertical section components and locate the cold solder.
In most cases it will be a loose connector from the Deflection coil to
the main PCB.Also check for the soldering of the Vertical output IC.