Question about Astar LTV-2701 27 in. HD-Ready LCD Television

1 Answer

Quick Question about power supply high pitch noise

I repaired the power supply but one of transformer (PQ32/30 40117) is making a squealing noise, it's that normal? Thanks.

Posted by on

  • casimec Nov 19, 2008

    I replaced
    (4) 3300uf 35v
    (6) 1000uf 10v
    (3) 2200uf 25v
    (3) 100uf 450v
    There are (1) 1000uf 50v and (1) 2200uf 35v That I didn't replaced because the looked good and not bulged or leaking.



×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,267 Answers

That noise should not be normal unless it was there from its new condition. That noise seems to be there when the circuit is demanding higher current from the power supply and the transformer is trying to keep up with the demand.
How many capacitors did you replace?

Posted on Nov 19, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Tv just started making a very high pitched noise, although picture and sound are fine?


Barb, noise may be from a power supply/ transformer on it's way out.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

HELP what is that high pitched noise when tv is on

Is your LCD making buzzing or high pitch noise

Mar 04, 2016 | Sanyo Dp55441 TV

1 Answer

My tv powers on displays the LG logo then makes a high pitched squeal sound from speakers and then flashes on screen (strobe light effect) does not display picture or sound.


LCD TV Repair Tutorial - LCD TV Parts Overview, Common ...

? 11:05
https://www.youtube.com/watch?v=tS4sIpdajVw
Aug 23, 2013 - Uploaded by ShopJimmy.com
Repair review of common LCD TV Problems and Repair Solutions ... input the tv is set to it begins making a high pitched whiningsound. .... I have a LG 47LN5750 that powers on, flashes a good picture for about 1/2 second, then goes dark. ... hi my samsung tvis not turning on is black. and I just replace the ...

#Treat At Home high pitched whine from plasma tv Tinnitus ...

www.aspenridgerentals.com/tinnituscure/?...high%20pitched%20whine%...
LG 50PK540 plasma TV Repair power supply EAY60968801 Part 1-2 ... Sanyo DP42849 with high pitched squeal after replacing power supply. ... In my second daily fix video, I solve a mystery that was making me having to turn off my speakers before I went to be ... The flash is accompanied by an high pitched sound.

TV not turning on; making high-pitched sounds - Tom's ...



Dec 16, 2015 | LG 55LE5400 TV

1 Answer

High pitch squeal after set is turned off


Power supply stills runs when off replace the power supply to stop the squealing noise

Jun 21, 2011 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

1 Answer

High pitch frequency noise coming from rear of TV and is very annoying to listen too. It is a constant noise and is more apparent when there is more black color on screen.


High pitch sound on LC-42D62 is reproduced by switching transformers on power supply board. To correct this problem, you will need to remove power supply unit from the TV, spray all transformers with SILICONE CONFORMAL COATING. Let it dry for 12Hrs. Then install power supply unit back.

Dec 31, 2009 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

1 Answer

Whining noise


High pitch noise on LC-42D62U is normally caused by one of the switching transformers on the power supply board. Solution to this problem is simple. Remove povver supply unit from the TV. Spray all transformers liberaly with SILICONE CONFORMAL COATING. Let it dry for 12 Hrs. Install power supply unit back on its place. Done.

Dec 24, 2009 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

1 Answer

Panasonic TX32POL1 high pitched noise


The high pitch sound is comming from a power supply transformer that will resonate (or vibrate) at the operating frequency (12-14KHz).
This is usually affordable to repair -at least worth the estimate.

Oct 14, 2009 | Flat Panel Televisions

1 Answer

Toshiba Regza bought 1/28/08 makes squealing noise


It's in the repair shop. I'll write back what the problem was and how much it cost to ship.

Oct 07, 2009 | Toshiba REGZA 47HL167 TV

1 Answer

Hd tv makes a hjgh pitched sound whats wrong


Hi, the high pitched sound is coming from the coils or transformers on the power supply.
you can isolate the noise by removing the back and with the set on press gently with a plastic handle/item on each coil till you stop the noise. , you will probably have to replace the coil or the whole power supply, but sometimes you can tilt it over or secure it with silicone and it will stop rimging.
please click a thumbs up it this helps solve your problem
Eric

Aug 19, 2009 | Samsung HP-R5072 50 in. Plasma HDTV

1 Answer

High pitched squeal


Hello, This sounds as if it could be a switching power supply problem or a ballast problem. Both will effect your power supply and cause malfunction in various subsystems (audio, screen control, control systems, and the like). I would suggest having a qualified TV repair technician look at the set. This is because there are no user servicable parts associated with this type of problem. I hope this helps, Thank you, Shuttle83 http://www.electron-age-technologies-llc.com

Jun 10, 2009 | Polaroid FLM-3734B 37 in. LCD HDTV

1 Answer

"High Pitch Squealing" from my tv.


this most likely a coil or transformer that is doing this
And yes this is worth fixing , shouldn't be to bad on the cost of the repair

Dec 01, 2008 | Sony Flat Panel Televisions

Not finding what you are looking for?
Astar LTV-2701 27 in. HD-Ready LCD Television Logo

Related Topics:

112 people viewed this question

Ask a Question

Usually answered in minutes!

Top Astar Flat Panel Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

The Knight
The Knight

Level 3 Expert

68229 Answers

Cindy Wells

Level 3 Expert

4755 Answers

Are you an Astar Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...