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Dstinson i took the cover off inspeced board no sign of bulged capacitor look long and hard

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Can you tell more about the problem pls?

Posted on Aug 24, 2008


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Posted on Jan 02, 2017

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1 Answer

Capacitor on lg lcd tv 32lg30r back-light inverter board has bulged out


Try replacing all the bulging caps you find and see if that does the trick. If you have a capacitor tester you might want to check the other caps in the proximity of the ones that are leaking. Sometimes a capacitor can go bad with no outward sign of its demise.

Nov 14, 2015 | LG 32LG30R 32" MULTI-SYSTEM LCD TV

1 Answer

Power turns off after 2 seconds once turned on.


Get an ESR meter, not all caps show outwards signs of failure.

Feb 05, 2014 | Televison & Video

1 Answer

Is on and sudenly turn off and is hard to back turn on again


Good day!!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter

I hope it helps you.
Please do not forget to rate my answer.
Thank you.

Sep 13, 2011 | LG 32LC2D Television

1 Answer

I have a 50' LCD polaroid tv i will turn it on the blue light goes on I see the POLAROID sign on the screen and then quickly it black and shuts off what could it be?


Good day!!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter

Sep 04, 2011 | Televison & Video

2 Answers

My 19 inch technica lcd tv won't stay on


Good day!!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter..

Aug 26, 2011 | Televison & Video

1 Answer

My plasma TV won't turn on. It worked just fine last night and has never shown signs of trouble. Are there common issues I should consider?


Hi,

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.

Mar 21, 2011 | Philips Televison & Video

1 Answer

Have sound but no picture


Hello,

If its not under warranty, pull the back cover and check the capacitors on the power supply. If there are any that are bulging or show signs of fluid leakage, replace them. If that doesn't fix your no picture but sound issue then you have a bigger problem. You can do it yourself pretty cheap and its not that hard. Just make sure you use the proper replacement capacitors.
But if otherwise
You most likely have a backlight issue with this TV set. Could be the inverter circuits for the backlights. The inverter is the power supply source for the backlights. there could also be a screen driver problem. This would entail changing the entire board.
Hope this help...

Jun 26, 2010 | SNK Magnavox 42MF231D 42 in. Plasma TV

1 Answer

Started by going out, now will not come on


Most probably a blowing capacitor on the board, if you can remove the cover, check for signs of bulging or leaking caps. Any TV engineer who is competent with a soldering iron can replace these if this is the problem

Feb 09, 2010 | Samsung 225BW Monitor

1 Answer

I have a polaroid 37 inch flatscreen hd tv...the light for the power comes on but the screen will not come on...sometimes if you leave it on the screen comes on later..there is no sound until the screen...


I did like everyone else has yesterday. I replaced (2) 1000 microfarad/ 10 volt capacitors on the power board with (2) $1.59 1000 microfarad 35v capacitors. I had to take the plastic cover off the back, then remove a metal cover to expose the board. You can follow the wires from the power cord. On my unit they are two small cylinders in the upper right corner of the board. The surfaces facing up were slightly bulging (indicates damage). I have a guy at work who messes with instruments all the time. It took him about 10 minutes. I got the capacitors at radio shack. The 35 volt capacitors are larger than the ones replaced, but fit in the available space, no problem.

Jan 10, 2010 | Polaroid FLM-3734B 37 in. LCD HDTV

1 Answer

Proview PL926Wbi


On modern capacitors 2005 or up the capacitors can go bad and not even bulge at the top. I replaced a few in my moms flap panel monitor and found out that there were more that were bad and they didn't show any signs of damage but put your finger on one of those suckers and it burns like a smoking gun.

Apr 10, 2009 | Proview PL926WBi 19" LCD Monitor

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