Question about Vizio VO32L 32 in. LCD TV

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T.v. has power, but no picture. Is it the capacitors in the power supply? I know this is popular issue with many lcd`s

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The most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.

I hope I shed some light on the subject for you.

Posted on Jun 28, 2009

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Posted on Jan 02, 2017

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1 Answer

2008 sanyo lcd tv DP26648 power turns on but no picture or sound


likely a mainboard or power supply capacitor issue.
if you have the soldering skills fix it, otherwise time to replace the TV.
If you can de-solder and solder in new capacitors make sure you are using high quality capacitors be very causious of capacitors purchased from auction sites.

Apr 30, 2014 | Sanyo DP26648-R 26 in. LCD TV

1 Answer

Replaced 3 capacitors for start up issue, now have radom with vertical lines


You will need to replace all the capacitors in the output side of the power supply. It is possible you have other bad capacitors that are not bulging at the tops. The power supply generates a voltage used by the the video processor on the main board. If this voltage is out of whack, it can affect your video. I would recommend you check all power supply voltages for accuracy and ripple.

Jun 18, 2013 | Samsung LN-T4665F 46 in. LCD Television

1 Answer

I have a magnavox lcd 42" tv. when i push the


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. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.

All these can be checked on the power supply board.

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.

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 | Televison & Video

1 Answer

The tv worked normally for a couple of hours and then clicked off, like in standby mode. when i switched it off completely and turned it on again it worked again but only for a short time. now only get...


Now tv turn on,pictures it flashes only a couple sec. than died have sound left only?Yes,than the tv power supply board,that the board where the tv power a/c cord plug into it.Board it might have dying and dead components parts that are called capacitors.Take the tv aparts.Inspect and check the tv power supply board carefully for dying and soon to be dead capacitors parts,these capacitors parts are alway bulges up or puffing up onto it tops.U have all the tools and know basic electronic also can do basic soldering work too?Yes,replaced all these dying capacitors parts are bulges or puffing up on to it tops capacitors parts with the same Micro Ferit and those capacitors voltages like 5 or 10 voltages higher the old capacitors components parts u replacing,now will solved this problems,also capacitors will last longer and have more heat resistance than before.If the tv power supply board check out and have none dying capacitors components parts that are dying and soon to be dead are bulging or puffing up on to it tops.Than the tv have those 2 long boards each of it sides that are called LCD inverter boards are dead,these 2 long LCD inverter boards only job are to provided the tv LCD screen panel a backlight to produced pictures.If u can't repair the power supply board by ur self,if the tv power supply require it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refrubish power supply board or those 2 long LCD inverter boards for the replacement.

Jul 19, 2011 | JVC LT-42X579 42 in. LCD TV

2 Answers

Samsung 32" LCD tv dead.


Hi,
Please check the power supply of your TV including fuse and cables. Totally dead TV usually need simple things.
Regards

Jan 17, 2011 | Samsung Televison & Video

1 Answer

When power is engaged only thing happens is a clicking noise and a flashing indicator source light


The power supply has failed on your LCD due to defective capacitors leaking or bulging. There are 17 capacitors that should be replace to restore the power supply functionality.
I could also repair the power supply.
Let me know if you need further assistance.
See the picture below

c430f15.jpg

Aug 27, 2010 | Akai LCT2715 27 in. LCD Television

1 Answer

Green lite on screen flashing no picture no sound


U know basic electronic's and know soldering?Ur power supply board is defective have dead leakage capacitors,these capacitor around the power supply board they bulges up it top,or puff it up on it top.Replaced these defective gases leakages capacitors,u tv will get it power back and funcstion normally.Or tries this websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Apr 30, 2010 | Proview Hx263 26 in. HD-Ready LCD...

1 Answer

I need a replacement circuit board for my Astar LTV-3001.. Mine began to smoke... and I don't allow smoking in my house...


The failures on these LCD's are due to defective capacitors in the power supply. There are about 23 capacitors that will need to be replaced to restore the LCD power supply functionality. Check the picture to see where the capacitors are located, the power supply on your LCD is not the same but similar to the one on the picture just the capacitors are place in a different order.
Let me know if you required further assistance.

Mar 10, 2010 | Astar LTV-3001 Television

3 Answers

I have a Samsung LN40A450 LCD TV that is only a year and a half old. I am getting no power to the tv only a consistent blinking red light and a audible clicking/beeping noise. What needs to be replaced?




I will explain how to:


  • Open the case of the LCD
basically in all LCD monitors have two circuit boards (power supply board and system board)
  • After you open you will see the two boards are

  • You see a board that has a socket for the power source. wrote that the board we're looking for (power supply board)
  • Remove all cables connected to the board and take out the board. (get noted before you unplug it)
  • Now you see it components on board, we looking for capacitor.(see picture below)
46ddc22.jpg

  • Looking for damaged capacitors, physically you will see a capacitor on the top like a bloated (see picture below)
7a91ba9.jpg
  • Replace the damaged capacitor with the same value that you can see on the surface of the capacitor. (In this step you need any soldering tool)
My advice: replace capacitors with higher voltage, like 10V replace with 16V or 25V will be fine.

Feb 01, 2010 | Samsung LN40A450 LCD TV

2 Answers

Samsung 32" can not turn on


Dear Bradleyphan,

two weeks ago I fix samsung LCD TV with the same problem and I've managed to fix it.

I will explain how to:


  • Open the case of the LCD
basically in all LCD monitors have two circuit boards (power supply board and system board)
  • After you open you will see the two boards are

  • You see a board that has a socket for the power source. wrote that the board we're looking for (power supply board)
  • Remove all cables connected to the board and take out the board. (get noted before you unplug it)
  • Now you see it components on board, we looking for capacitor.(see picture below)
46ddc22.jpg

  • Looking for damaged capacitors, physically you will see a capacitor on the top like a bloated (see picture below)
7a91ba9.jpg
  • Replace the damaged capacitor with the same value that you can see on the surface of the capacitor. (In this step you need any soldering tool)
My advice: replace capacitors with higher voltage, like 10V replace with 16V or 25V will be fine.

Feb 01, 2010 | Samsung LN32A330 32 in. LCD TV

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