Question about Samsung LE40R74BDX 40 in. LCD Television

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TV will not switch on, just keeps clicking. I

TV will not switch on, just keeps clicking. I think from past answers that this is the capacitor. How easy and expensive would it be to fix this problem.

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  • 416 Answers

Yes, most likely cause is that you have failed capacitors on the power supply board. I published a little self repair guide that can assist you with this repair. It is not for your model, but it will certainly by helpful if you want to give this a try. Have a look at my Tips & Tricks if you like... best wishes, I hope this was helpful.

Posted on May 15, 2010

  • qnx101 Feb 12, 2011

    Thank you so much for this post. Instead of having to buy a new tv with your hints and tips sheet it cost us just £1.50 to replace the parts and less than half an hour to fix it. Can't thank you enough.

  • greenday12
    greenday12 Jun 25, 2012

    could you link me to this guide please as my tv has recently had the same problem. Thanks

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2 Answers

Ive been using my ps3 on my lg 42'' lcd tv for 3 yrs now perfectly then this past few when playing a game i keep getting lots of lines distorting my picture after about 5mins of that it goes b


Sounds like a blown capacitor on your board to me. Its a common problem in Samsung TV's and is typically an easy fix, but I think in the LG's its a bit more expense and not as easy as swapping out a Capacitor. I think the main board may have to be replaced there. What actually happens is the capacitor bursts at the top and oozes liquid that solidifies, its caused when the capacitor that is used is underrated for the application (basically some engineer's solution to making us have to buy a new tv in 3-4 years, a slightly underrated capacitor will have a shelf life of use, kind of like a timer, they all do it belive me) eventually the set will not rendure any picture at all and the board will have to be replaced.

Mar 01, 2012 | LG 42LG30 42 in. LCD HDTV

1 Answer

Tv with no picture. i just bought a new bulb but still flashing lamp and no picture.I can hear it click on but thats all


Hello,

since you didn't get any picture, does the TV bring out sound? If the TV does not bring out sound, then it means the TV is having a power problem.

The clicking sound most of the time indicates a bulged capacitor on the power supply board of the TV. I think problem is with the power supply board and not the bulb.

But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress from www.shopjimmy.com.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Regards.

Sep 27, 2011 | Mitsubishi WD-57733 57" HDTV

1 Answer

TV will not switch on, just keeps clicking


Hello,

The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

Feb 03, 2011 | Samsung LE40R74BDX 40 in. LCD Television

2 Answers

Mitsubishi WD-62525 bglod fixed, but inputs are broken


look for dried out thermal paste on the transistors / i.c.'s especially on the power supply board.
test while the set is on, carefully! using coolant spray (freon) and, a hairdryer to find heat related faults keep turning the set on and, off to replicate the problem as you heat and cool components until you find the offending component. the coolant is non-conductive and, will not harm anything it touches except you. wear safety glasses and, keep your hands out of the way of the spray nozzle.
remove old non-conducting paste if a component gets too hot and, re-apply the paste.
radio shack sells the coolant spray (component cooler) and, the paste.

Jul 23, 2010 | Mitsubishi WD-62525 62" Rear Projection...

1 Answer

Phillips projection tv 55pw9363 has sound but no picture whats up


To answer you question about if its worth it?

This all depends on what is wrong with it, Keep in mind here Tech's here cannot L@@K T@uch and feel your TV, They cannot smell if there is something burnt. We are relying on you to use your eye,s ears nose and fingers to communicate your issues for a possible repair.

Get estimates from local repair guys Ultimately that is where this repair will end up. fixya only works if you have general "working" knowledge of TV repair or electronics. Can we fix it for $12.00 the answer is NO, We are not fixing nothing its actually you doing all the work while we guide you.

We give you information for a possible fix. We only can diagnose what you say and what you say is subjective and may not be the cause.

Capacitors play a huge role on how you tv reacts trust me if a capacitor gave out your tv will be acting funny or not powering on and the laundry list of issues will be taking place.

We at fixya meaning me and my fellow experts do this more or less as a public service the payment is so shortcoming for each of our answers to you. So think about the time and information we give when you do click the accept button. Try the methods others have given you.

IS it worth it? Well think about this your getting Educated, a possible fix and some experience for the price of the service so in my humble opinion it is worth every penny! Try our problem solving skills what if it was a $2 capacitor? What if it was a $12 dollar Thermal fuse wow you save $200-$600 on repair bills. Now as yourself this was it worth it?

If you like my portable e-book I written for you here please show support
for your expert and click the accept button- Thanks and have a happy holiday.

Dec 12, 2009 | Philips 55PW9363 55" Rear Projection...

2 Answers

TV KEEPS CLICKING.ACTS LIKE CUTS ON AND OFF REPEATLY


Check for leaky capacitor in the switching relay area

Aug 17, 2009 | Samsung LNT5265F 52 in. LCD HDTV

2 Answers

Tv wil not turn on just keeps making a clicking noise


ur relay keep try hard to turn tv on that u hear clicking noise.
+5VDC is leaking! open back cover,check power supply board.
1000uF or 2200uF capacitor is popped open or leaky.replace with known top quality capacitor.do it ur self repair will save u $200.

Jul 07, 2009 | Samsung LN-T4061F 40 in. LCD HDTV

3 Answers

Power won't come on- constant clicking loop instead


My T.V. did the same thing and it was due to bad capacitors on the power supply board. the tops of the capacitors were bulged, once replaced it worked fine. It involves sodering in new capacitors total cost $30. that includes buying the sodering tool. Keep looking around on line someone had pictures step by step how to do it.

Mar 26, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

4 Answers

Panasonic 27 inch TV Model CT-2701G built 9/2003


Hi-

Try removing and reinstalling the cables from the back of your TV.

Keep us posted, thanks for using Fixya!

Jul 14, 2008 | Televison & Video

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