Question about Vizio P50HDTV20A 50 in. Plasma HDTV

Open Question

How to test a basic relay

No power with Remote or Buttons on TV, And know clicking sound from the Relay And know bulged capacitor And I have 120 Volts coming on the board

Posted by Anonymous on

6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 23 Answers

SOURCE: I'm trying to repair this Vizio L37 HDTV. At first

I plugged the TV in again and then I heard a loud pop. I then figured that was it for that one. I proceeded to recycle it.

Posted on Jun 05, 2009

  • 11361 Answers

SOURCE: Vizio SV470XVT1A has no backlight

The 24vdc is turn on by the signal from the main logic board, it is not always on, the standby 5vdc is always on. So yes it can be the power supply board is bad, but just to besure we need to find out if it is getting the turn on signal from the main board first.
You can have 24vdc at the inverter board and it will not light up the CCFL until it gets the signal from the main logic board to turn the lamps on (this is the STANDBY condition, the TV is on but the screen in not lit up util it see the video signal).
Send me good clean and clear pictures of the power supply board,, connectors of the Power supply, bottom side of the board, then I may be able to tell you which pin is a control input pin. Most people will just throwing parts in and hope that they one of the parts will fix the problem. Used Power supply module for this TV is over $100.

Posted on Jul 05, 2010

Testimonial: "Bud helped me fix my TV! It was only 1 1/2 years old. I was looking at a repair bill close to $300 - $500 and I fixed it with a $60 board! Thanks!!!"

  • 4889 Answers

SOURCE: Visio p42hd, no picture

Yes it does sound like the mainboard. But we have to confirm. I will see if there is a service manual for this unit in my collection but do you think you can safely work on it? Have you worked on electronics before? The last thing I want is you hurting yourself trying to fix it. HV circuits are not to be messed with unless you know about them.

Posted on Nov 03, 2010

  • 11361 Answers

SOURCE: When plugged in, the logo flashes white.

The 5vdc standby is working but not the 12 or 24v?
You need to find out if the power supply board is getting PS_ON signal from the main board to turn on the 12/24vdc power supply section.
Please read my guide to get some understanding first.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
Failed TV and Monitors:

Learn about bad caps:

Capacitors kit: he can make you a set of caps.
Or just make sure to use caps with low ESR, 105c rating such as PANASONIC FM or FC series.
Please post back what you find.

Posted on Dec 06, 2010

  • 1238 Answers

SOURCE: vizio m420nv has sound but no picture

Hello there

Actually that problem is very common on all LCD TV,, that problem is cause of either inverter board or t-con..

In this case you don't need to check the voltage that is too complicated for you,,only visual check is enough..

I share you my tricks and hope it helps..

Power on your TV turn off your lights..if you will see the light comes from the screen the problem is t-con..if no light the problem is inverter board (backlight) board

Hope it helps..

Don't forget to rate..

Posted on Aug 25, 2012

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

I would like to know the procedure to reset this TV because what it does as the power cord is plugged in the relay click and the power light comes on and then the relay clicks on and off until theOPC light...

If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.

Mar 13, 2015 | Televison & Video

1 Answer

Turned it off, now it wont turn on, can hear relay click when pressing power button, power LED on front is always on, no picture no sound, if I unplug for 30 mins, when I plug it back in I believe I can...

Good day!!!!

If you hear a clicking sounds of relay inside that means your TV have a voltage on the power supply section.However,when the high voltage attempt to switch the voltage will dropping down and the TV won't turn ON that,s why you hear a HV (high voltage) charge or what we call HV (high voltage) oscillation..

That problem is commonly cause of faulty capacitors on the power supply section..You can easily identify the bad capacitors if it is look like bulged/dome or sometimes leak in oil but not all faulty capacitors have an obvious indication like that because sometimes faulty capacitors look like good but the actual capacitance value change its either lower or higher than the original capacitance value.In that case you a special tester called capacitance meter to identify the faulty capacitors..

This is the sample image of bulged/dome capacitors.

Please let me know if you found any bulged capacitors on the board..If that so kindly replace it only with same type,ratings and value..You can buy it locally or online and if you want sir I'll be the one search it online just give me the value ex.2200uf/50v. uf-means microfarad and v is for voltage..

If you can't find any bulged capacitors let me know,maybe that is time to proceed for advance troubleshooting.In that case you will need a multimeter tester for voltage this stage you need a moderate technical skills to perform this kind of troubleshooting this stage not advisable for the non-pro so let me know if you have any electronic background..If you don't have electronic background as much as possible I can't advice that because its too dangerous..I can diagnose the problem base on what you see and observation..

Just keep on touch!!!!

Hope it helps..

Try to watch this video on how to replace bad capacitors..

Jan 14, 2012 | Hitachi 43FDX20B 43" Rear Projection...

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


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 ""(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

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.


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

1 Answer

Last time turned on tv picture flashed and went dead, Now when I turn it on it makes its normal clicking sound but does nothing. no power light or sound black screen, set is rarely used. Only thing it does...

Sir this problem is commonly caused by bulging capacitor or loosed connection, if you remove the back cover be sure to unplug the unit. Bulging capacitor is producing a low and unfiltered DC supply, one of the sign is the clicking noise you hear came from the relay. Or try to tap the side of your tv and observe if the tv will react. ekcnoel_9.jpg
This a bad capacitor ekcnoel_8.jpeg
this is the loosed or dry joint it is much better if you use a magnifying glass to determine the loosed or dry solder. Good day and best regards.

Sep 17, 2011 | Mitsubishi Televison & Video

1 Answer

I push the power button but it does not want to turn on. It only makes this clicking sound.

The tv have a power supply board problems that the causes.That the board where the tv power a/c cord plug into it.U have all the tools and know basic electronic and also can do soldering work too?Yes must take the tv aparts and check the tv power supply board carefully for dying and leakages capacitors components parts.These capacitors parts are dying and leaking and they are alway bulges ups or puffing ups onto it tops.All these capacitors parts are dying or leaking are bulging ups or puffing ups onto it tops.All these capacitors parts are the causes of the clicking of the tv power supply board.Must changes all these dying and leaking capacitors parts.Or tries websites like, to buy a whole new refurbish tv power supply board for the tv for a replacement will fixed this tv pronlems.

Aug 20, 2011 | LG 42LC2D 42 in. LCD HDTV

1 Answer

The tv is a plasma TX-P50S21B Panasonic.After pressing the power on button,the power indicator flashes green very fast 30times then the power relay clicks of.The power indicator then flashes 7 times...


Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like, to buy a whole refurbish power supply board for the replacement.

Take care in solving the problem....

Aug 01, 2011 | Televison & Video

1 Answer

When attempt to turn TV on, either by remote or power button, the standby indicator light begins to flash and TV fails to turn on. After several times of clicking the remote, the TV turns on. What could...


Your power supply board is not yet dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like, to buy a whole refurbish power supply board for the replacement.

I hope this help in solving the problem....

Dec 24, 2010 | Sony KP-53HS10 TV

1 Answer

I try to power the tv on and all is does is make a clicking sound periodically. Usually it powers up but sometimes just cycles through that clicking sound

Tv have dead dying to be dead parts call capacitors in ur power supply board.That the board,where the power a/c cord plug into it.U have toools like a soldering iron,a desoldering pump or a roll of desoldering braids,a roll of solders,also know basic soldering and understanding basic electronic? Yes.Check the power supply board closely look for dying capacitors are bulges or puffing up on it tops.By replacing these dying to be dead capacitors,will solved ur tv clicking noises or delaying power on to the tv screen.Or try website like to buy a whole refurbish power supply board for the replacement.

Dec 11, 2010 | Samsung HP-R4272 42 in. Plasma HDTV

1 Answer

Heard a pop sound...turned it off then back on and the red light is flashing and it's making a clicking sound

This problems it the causes by the power supply board have dead parts call capacitors.That the board,where the power a/c cord plug into it.U have tools like a soldering iron,desoldering pump or a roll of desoldering braids,a roll of solders?U know basic electronic and can do basic soldering?Yes,check the power supply board for dying and dead capacitors,these capacitors are alway bulges up or puffing up on it tops.Replaced these dying and dead capacitors parts,will get ur tv stop making clicking sounds and the tv power will be stable again,tv will work.Or try website like to buy a whole refurbish power supply board for the replacement.

Nov 27, 2010 | Fujitsu Plasmavision P42HHA10 42 in....

1 Answer

Power supply of tv

if voltage drops means there is a short circuit in your tv. 1 disconnecting 120v line if supply becomes ok then there is short ckt in horz.section &if it does not gives 120 volts then there is problem in power supply. please check as per instruction &let me know. good luck.

Sep 19, 2007 | Proscan PS36500 36" TV

Not finding what you are looking for?
Vizio P50HDTV20A 50 in. Plasma HDTV Logo

Related Topics:

29 people viewed this question

Ask a Question

Usually answered in minutes!

Top Vizio Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74106 Answers

Level 3 Expert

749 Answers

Computer Repairing
Computer Repairing

Level 3 Expert

14641 Answers

Are you a Vizio Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides