Question about Televison & Video

Open Question

We need to know which board we need to be replaced... *Mother, power,or inverter board... which one can cause this effect.. the TV has audio but screen is black.

Posted by 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.
Good luck!

Posted on Jan 02, 2017

  • 191 Answers


unplug ur backlight inverter plug &power on to see ,if it doesnt on , change ur mainboard

Posted on Nov 10, 2008

  • 718 Answers

SOURCE: Vizio L37hdtv10a fails to fully turn on

You will have to isolate the main board and Inverters.
Unplug the inverters and turn on the set.
If it "turns on" then try re-connecting each inverter seperately to see if only one is causing the problem.

Posted on Mar 07, 2009

  • 1 Answer


I had the same problem with my 32" Vizio lcd tv, I took it to a repair shop and they said it might be the motherboard but they didn't seem too sure about. I am considering ordering the motherboard and trying to fix it myself hope this helps.

Posted on Dec 02, 2009

  • 1779 Answers

SOURCE: Inverter Board

Go to they have it and you can download the svc manual.

Posted on Dec 21, 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!!!"

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

What exact part do I need to replace for a back-light issue on my LG TV? Is is the inverter part of the main board?

Some sets have a separate inverter board to power the back lights. Others have the inverter circuits included on the main board. What you need to do is find out what is what with the assistance of LG and go out and replace the appropriate board. Make sure it is the exact same number so you have no hassles.

Mar 18, 2016 | LG 42GA6400 42-inch 3D LCD TV

1 Answer

I have a Polaroid 40gsr3000 40 in lcd tv. sound works no picture. think maybe inverter board. One board in middle of back .one long strip board that runs along bottom of tv. Is this inverter board?

What you have is an led tv . And the inverter for the back light led is there in the main board (mother board.) of the tv. Its no a separate board.
The the Log board you see is the TCON board which drives the led panel.
If you wish replace the inverter the you have to bay new mother board for you tv. In the model you have Almost every thing is integrated to the mother board like power supply ,back light inverter board the cpu section.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.

Dec 30, 2015 | Polaroid Televison & Video

2 Answers

Can a tv inverter board cause tv to not display

inverter board may be used to power backlight for the lcd display. If it is similar to laptop lcd displays in functionality .

Apr 17, 2015 | Coby 40 TFTV4028 LCD TV

1 Answer

VIZIOP42HDTV10A . It hadn't picture mean black screen , but hear sound from every channel and all another devices input

hi, Your tv has problem with its back light inverter stage. All LCD TV have back light to illuminate the pixels. There are two types of back lighting CCFL(Cold Cathode Fluorescent Lamp) and LED. In your tv its ccfl. As it is ccfl it need a high voltage above 1000v. To provide such a high voltage there will be an inverter stage in all lcd tv with ccfl back lighting. Normally in LCD tvs there will be three boards such as Mother board , Back light inverter board, and power supply. In your tv the ccfl back light inverter stage is faulty. There will in inverter transformers in the inverter board. As it is high voltage transformer there is possibility of its winding get shorted. If so it will drain a high current from the power supply and the protection circuit will shut down the voltage to the inverter board. check the inverter board first. Also there is possibility of bad electrolytic capacitors in the inverter board will lead to this type of problem. First of all check the supply voltage from the power supply to the inverter board. Change the electrolytic capacitors in the inverter board and in the power supply stage. If the problem is not rectified then you have to replace the inverter board. ok

Jun 10, 2011 | Vizio P42HD Television

1 Answer

Tv flickers off and on

You have to check the back light inverter of your lcd tv. In all lcd tvs there are back lights to illuminate the pixels. There are two types of back lighting in use . CCFL ( cold cathode fluorescent lamp) and LED (light emitting diode). In you your tv it will be CCFL. If it is CCFL then it need an inverter (voltage step up circuit) for getting its working voltages. Normally it will produce above 1000V in low current. In the inverter circuit there will be inverter transformers. If the winding of the transformer get shorted then the inverter will drain a high current from the power supply. If so then the current sensing circuit senses the same and it will shut down the power supply. That's why it do the cycle ON an OFF repeatedly.
Just check the inverter board. Normally there will be three circuit boards in LCD TV. Mother board, SMPS (switch mode power supply) and inverter board. In some tvs the SMPS and inverter bord will com-pained as one board. you have to check the inverter transformers. there will be 4 or 6 inverter transformers. if available replace the inverter board as a whole.
Also check the electrolytic capacitors in the power supply. if any of the capacitor seems like one that in the picture, then replace the same and then only go for the inverter board

ajin_g_8.jpg ok

May 29, 2011 | LG 42LC2D 42 in. LCD HDTV

4 Answers

Mag 3200 lcd tv wont power on. when you push power blue light comes on, backlights come on but no picture or sound, and when i try to power off it wont power off i have to disconnect power.

Re:"Mag 3200 lcd tv wont power on.when you push power blue light comes on, backlights"

That means that the monitor is in forced standby. This happens when an internal fault is detected. The state is called protection or protect mode.

Try first leaving the unit disconnected from power for 15/20 mins, that will probably not fix the problem, but is a necessary step in troubleshooting. (general indications here Why my TV does not start up and remains in standby.Guidelines are valid for all TV. Under protect mode TV will act in different ways depending on model)

The unit is repaired testing the internal component.

This TV comprises few boards: a Button/IR board, a digital controller board, a PSU, an inverter.

If you are a repairer,testing willl start from PSU, following voltages on main board and testing the inverter.

Parts can be tested following this procedure : A full test ...

the best way to contact an authorized technician is by ringing the number listed on the owners manual. Alternatively try Fixya directory here:Fixya directory- Consumer Products Repair

To get parts try ShopJimmy .



Aug 19, 2010 | iLO 3200 32 in. LCD Television

1 Answer

My Sony LCD TV has audio but no video

Seems like your time-control board a.k.a. (LCD BOARD) is defective or the power supply board is not producing working dc voltage too the inverters. In that case the power board would need servicing. It could also be the CCFL lamps but thats very rare. See if the inverters are working by only disconnecting the wire(s) going from the inverter too the lcd-board. If the lights come on after you disconnect the lcd-board from the inverter then you know its the LCD board thats the fault here.

Nov 13, 2009 | Sony Televison & Video

1 Answer

PLTV 26 LCD TV sound-no picture

I would suggest to check the 24 volts from the power supply to the backlight inverter board. If the voltgage is missing or lower then 20 volts, the power supply is defective. If the voltage is correct, you might have a defective light inside the TV behind the screen since you've replaced the backlight inverter board; you now the failure is not there. The lights are connected to the backlight inverter board.
Let me know if you need further assistance.

Jul 30, 2009 | Protron PLTV-32 Television

1 Answer

Vizio L37hdtv10a fails to fully turn on

You will have to isolate the main board and Inverters.
Unplug the inverters and turn on the set.
If it "turns on" then try re-connecting each inverter seperately to see if only one is causing the problem.

Mar 04, 2009 | Vizio L37 Television

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

19 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

75032 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Cindy Wells

Level 3 Expert

5306 Answers

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

Answer questions

Manuals & User Guides