Question about Westinghouse SK-32H540S 32 in. LCD TV

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Humming Noise I just purchased the Sk-32H54OS and I noticed a humming noise when volume was turned all the way down and when picture was on screen.  When I changed channels or have input selected where it is a black screen, the noise goes away.  I don't think this should be normal, if so it's a disappointment.

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3 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
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Posted on Jan 02, 2017

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Chi Chu

  • 8457 Answers

SOURCE: wanted to adjust quality of sound, such as treble

Go in ur menu pick the audio go down pick the reset the tv set back to factory setting will get the

Posted on Mar 24, 2010

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SuperTech-11

Norman Skinner

  • 1591 Answers

SOURCE: Westinghouse 32" LCD TV model SK-32H240S. When the

the high pitched noise is probably coming from a transformer in the unit, which leads me to believe that 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 repeatedly turn it on, eventually it'll probably stay on, but every time you turn it off, the TV will get harder and harder to start up until one day it just won't.
Sometimes you have to do the opposite to start it up and unplug it for 5 mins, then try.

If you aren't tech savvy, this unit needs to go in for repair.

If you are handy with a soldering iron and can identify the power supply and inverter / FM section for the backlights, 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).

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

I found some great videos of the procedure (for different brand, but 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 15, 2011

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