Question about Samsung HP-T4254 42 in. Plasma Television

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Sp-R4212 Plasma no picture keeps changing channels when you go to the menu the menu keeps rolling won't stop if I unplug the set for a few days you can go to setup and get it to work I had Sears out to fix it and they disconnected the side buttons. That did not work. they said it would not work. I have had it working for over a year now. But it keeps doing the same thing about every three months.

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When the menu starts rolling, take the remote out of the room to see if it's the remote causing the problem.

if it's not, check for bad capacitors on the boards.

There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.
Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced.

If you are handy with a soldering iron and can identify the bulging or leaking capacitors, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are positive it's only doing ripple filtering, and even then, you should go OVER, not under the uF rating).

Most of the caps that go are 10V 1000uF or 3300uF.

I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.
http://www.youtube.com/watch?v=Mm51C_RDIZE
http://www.youtube.com/watch?v=BNHHrgX_6cs&feature=related
http://www.youtube.com/watch?v=8l0AUj8QUkg&NR=1&feature=fvwp
http://www.youtube.com/watch?v=Y7b_nTaZYcU&feature=related

As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors.
The parts are cheap, and skill required is minimal.

Posted on Mar 25, 2011

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