Question about Dynex 32 in. LCD Flat-Panel HDTV

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Ringing sound when TV is off

There is a loud ringing sound when the TV is turned off and plugged into the power outlet. Is there any way to fix this?

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  • 308 Answers

Change the power supply board. What you are hearing is the switching power supply. They work at high frequency and sometimes produce lower ferquency harmonics that can be heard by people.

Posted on Apr 30, 2010

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Posted on Jan 02, 2017

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Funai tv. When plugged in, makes ear piercing high pitched buzz that goes away when unplugged. Will not respond to buttons. No picture or power. Already replaced power board. What now??


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1 Answer

Wall plug for TV buzzes


Have the outlet checked by a qualified electrician. Sounds like either a power issue or ground. You should not get a buzz from an outlet for any reason.
If you plug something else into the outlet does it make the same noise?
If yes, something going on with the power. If not, then the TV power supply might be doing it, but the noise would be behind the TV and not the outlet.

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Can anyone tell me why my Brother MFC-J630w wont turn on. I was using it earlier. When I unplug it & plug it back in, the light doesn't come on. It just makes a ringing sound.


1. Unplug the power code then plug it in again. Do this where it plugs into the wall and also do it where the cord plugs into the printer.
2. If the printer is plugged into a power strip, switch to off then to On.
3. If nothing else is plugged into the same wall outlet or power strip, plug in a lamp, for example, to see if it works. If not, the circuit breaker for the wall outlet probably needs to be reset. Circuit breakers are in the main electrical panel/box for your house. There should be one that is moved to the left. Push all the way to left and then push to right firmly until it makes a loud CLICK.

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1 Answer

Viore tv won't power up after power outage.


I would first test the outlet. Unplug the TV and plug in your vacuum or other loud or bright object. Turn on test object - if there is no operation, then you have a tripped circuit breaker. Find the electrical panel ( Grey box mounted into a wall, usually in a closet). Find the tripped breaker ( typically the switch will be halfway between on and off, and many have a red indicator by the switch base). Turn switch to off fully, then back to on.
Retest outlet.
If still no power to outlet, unplug everything from that outlet and call an electrician - there may be a serious problem with the wiring!
Hope this helps!!

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1 Answer

Tv (plasma) made loud pop then went black, turned off still no picture but has sound through different channels. Happened before and dish said to reset box? thanks


That's an interesting issue you posted, yfz45011959! Try unplugging the receiver's power cord from the outlet for at least ten seconds and then plugging it back in. If that doesn't fix the problem, let me know what type of receiver you have. The model can be found on the front panel in the bottom left corner.

Hope that helps!

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1 Answer

My tv made a loud noise like a vacuum them a high pitch noise and now it wont turn on unless I keep flicking the surge protector on and off.It wont even work when plugged directly into the outlet.


Power supply...The vacuum sound you heard was a capacitor failing. A capacitor stores energy for later use. For example, you turn on your TV, seconds later you hear a "Woosh" and the picture comes up. This is your tv's capacitor discharging. It's a simple fix if you know electronics though I wouldnt recommend repairing this yourself. There are several capacitors inside your TV. Though not fatal, they can give you a jolt. Call a repair man. I hope this helps : )

Jan 07, 2011 | Televison & Video

1 Answer

Sound fluctuates


yes its worth getting it fixed.as its the problem in your main boards capacitors they r gone faulty and needs to be replaced.

still before taking it to the repair center remove all the external devices from the tv and then un plug the main wire of the tv from the power outlet and then plug it again after 10 minutes and without connecting the external devices check whether the same sound problem occurs.if not the problem is due to the external device which you had connected.and if the same sound problem occurs then take it to the repair center.

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Model F27650 RCA Entertainment Series


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