RE: Plama TV TC P50G20.TV, less than 2 years old, has started making high pitched whine/buzz once it heats up (after about 10 minutes). This is VERY annoying during quieter moments of TV viewing. This is not a problem with the sound. It seems to come from the upper right side (screen side). It sounds, roughly, like a computer fan going bad. What should I do?Thanks.
Model: TC P50G20
Have no idea where to begin.
Hi and welcome to justanswer.To answer your question;As a matter of fact , it could very well be one of your fans going bad ,worn bearing etc.There are 3 of them in your tv .The only way to find out if it is the case and which one would be to remove the tv`s back cover i`m afraid.
Once the cover is removed you could wait until the sound appears again and then stops the fans manually one by one.
I will be in standby, just send me a reply ,and i will be notified and be with you ASAP.
I can't do this just now. That's a little more involved. I'll be able to do it a little later this morning.
No problem , take your time and let me know how it goes, i will be here all day
If you`ll give me a minute , i will upload a document that shows you the screws to remove.
Here it is , click the link here in blue "CLICK ME"
I have not take off the back yet--a little nervous about that. I'm working at home this a.m., so I had time to let the set warm up. I listened closely in back (with the sound muted) and I do hear the fans, but now I don't think that is the problem. The whine seems to come from the upper part of the T.V., but I think it is louder at the (top left of the back, not right as I indicated earlier--but I hear it , really all across the top of the set--not so loud at the botom. The high-pitched whine is connected to the picture. As the screen changes between commercials, the whine drops for a half-second.
Was afraid of that
Then this is most likely casued by loose winding on a coil or transformer that oscillate at the tv`s frequency
Can be a pain to pin-point at times , won`t hurt anything but can be bothersome.
Usually can be repaired with glue ,silicon, or epoxy on those windings once you found the culprit
You would still need to remove the back cover but this time i`m afraid that you might need the help of a local tech. on this one.
You would usually push and pry different part of the circuit and components while the tv is working, unless it is very obvious from the start
he left side of your tv (from the back) is where the SC (y-sustain) board is located and it does work the hardest in the tv
Along with the power supply P board but this one is located dead center at the back
I'm game to try.
I'll probably do this later when I have more time to focus.
However, I'm worried about shock--what do I need to avoid--and also, I don't want to short out anything.
Lastly, how much , ballpark, might it cost to get a tech to fix this, if you are right, and I really think you are. Thx.
Pair of gloves would work fine and also something non conductor like a wooden salad spoon to knock and pry around
If you were to replace that board you mean ?
i'm more of a glue and duct tape guy, but i'll replace it if that is best.
i wasn't serious about using duct tape, :0
Yes , i understand :)
Either the SC board or power supply cost around $90
If it gets down to that i will give you the info to get one
okay, how do i get back to you once i sign off today?
Just log back in justanswer and go to "my questions" , that is the tab above.
I think you said this is annoying but not serious. Will the coils be obvious once I remove the back? Or, do I have take more off to see the coils? I may just call a tech to come deal with it when I get to that point. but, if this is visible, I might try it, so long as there is not a huge risk of frying my t.v. by touching the wrong thing.
As i said ,as long as you use something non conductive ,made out of wood or plastic, you will be fine
There are coils that are obvious, specially on the power board but i must tell you that sometimes even for an experienced tech. , this can be a bitch to find
35 years experience as audio,video repair and installation tech
oops, didn't mean to cut off your answer. do you have more to tell me?
Not really , just wanted to add " pardon my french" :)Let me know once you`re there .Thanks for the accept and bonus !Jack41036.615275463