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INVERTER PROBLEM HOW DO I CHECK THE INVERTER FOR THE BACK LIGHT ON MY TV

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Vizeo tv no picture


If audio is OK, the fault would be with its back-light inverter. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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1 Answer

How do i fix my smart tv


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board . In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
http://electro-medical.blogspot.com/

May 07, 2016 | Vizio 70-inch LED Smart TV M701D-A3R 3D...

1 Answer

My lcd screen off but sound coming


Hi,
probably the back light inverter of the tv faulty. As you didn't mentioned anything about the brand and model number of the tv, its not possible to know is it an led back light or CCFL back light. Any why if its an led tv the you have to replace the led drive and if its an lcd tv with CCFL back light the you have to replace the back light inverter. Check the video for more details.
LCD TV Repair Tutorial Backlight Inverter Common Symptoms Solutions How to...
www.electro-medical.blogspot.com

Sep 13, 2015 | Televison & Video

1 Answer

HOW DO I FIX MY LG 42LE5300 TV?


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
Some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

Sep 11, 2015 | LG 42LE5300 42 HDTVReady LCD TV

1 Answer

My tv screen went black


Hi,
If you have problem with video only then the back light inverter board of your tv is faulty. You didn't mentioned any thing else. Is there is sound or not. If sound is ok then the back light inverter is faulty. There is no repair possible with the back light inverter board. You have to replace the bosrd with a new one. As you didn't mentioned the model number of your tv, it is not possible to sent you any deatiles like where you will get the inverter board and its cost. Try to add full discription of the complaint and the model number of the TV.

Anyway check the link bellow to see how the back light inverter board looks like.

Inverter

Ajin

Mar 31, 2012 | Haier Televison & Video

1 Answer

My tv is about 3-4 yrs old. Toshiba Regza 47 inch. The tv has been on all day and suddenly a faint grey line appears on the right side of tv only noticeable when picture is light in colors, cannot see if...


hi,
You have to check the back light section of your lcd tv. All lcd tvs have back light to illuminate the pixels. Two types of back lighting are there CCFL (cold cathode fluorescent Lamp) and LED. In your tv its CCFL. CCFL need high voltage 1000V or above . For providing this high voltage there is inverter stage ( back light inverter). Also there will be 12 or more CCFL behind the lcd screen. If any on of there CCFL failed the there will come a gray bar noticeable only when there is hight light.

There will be two causes for this problem.
1. CCFL is faulty.
2. The inverter transformer driving CCFL is faulty.

You have to check the inverter fist. For conforming which one is faulty do the following.
There is 10 independent connection for every two CCFL from the inverter board. Try interchange the two nearest connection. And watch is the line is shifting or not after every interconnection. You have to try by interchanging all the nearest to connections for CCFL.

If the line shifted then the inverter board is faulty. If the line stays there then the CCFL is faulty. Normally there will be problem with inverter transformer. If the transformer is faulty then you have to replace the inverter board as a whole.
ok

Jun 11, 2011 | Toshiba REGZA 47HL167 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

My LG 21 int ch flat screen takes time to show pictures,the red button appears on and sound will be heard but their will be no pictures,they appear after some time please help me.


hi,

You have to check the back light of your lcd TV. All lcd screen have a back light to illuminate the pixels. you can conform is the back light is faulty or not by watching the lcd screen nearby. Watch can you see any image (negative image) on the screen. you have to look very closely. if you see any image on the screen then the back light or the back light inverter is faulty.

first of all check all the electrolytic capacitors in the power supply and back light inverter board.If available then replace these capacitors first.

You have to check the back light inverter board. Normally in lcd monitors you can see three circuit boards. power supply, mother board, and the inverter board. If available then try to replace the inverter board. There are high voltage transformers in this board. There is a chance for its winding get short. You will not get the transformer in open market. Try for the inverter board .
ok

Jun 09, 2011 | LG 37LD450 37 in. TV

1 Answer

The green light comes on but the screen wont light up, meaning the tv wont turn on


hi,
You have to check the back light of your lcd TV. All lcd screen have a back light to illuminate the pixels. you can conform is the back light is faulty or not by watching the lcd screen nearby. Watch can you see any image (negative image) on the screen. you have to look very closely. if you see any image on the screen then the back light or the back light inverter is faulty.

You have to check the back light inverter board. Normally in lcd monitors you can see three circuit boards. power supply, mother board, and the inverter board. If available then try to replace the inverter board. There are high voltage transformers in this board. There is a chance for its winding get short. You will not get the transformer in open market. Try for the inverter board .
ok

Jun 09, 2011 | iSymphony LC24IFH7PB LCD TV

1 Answer

No images only the sound


hi,
You have to check the back light of your lcd TV. All lcd screen have a back light to illuminate the pixels. you can conform is the back light is faulty or not by watching the lcd screen nearby. Watch can you see any image (negative image) on the screen. you have to look very closely. if you see any image on the screen then the back light or the back light inverter is faulty.

You have to check the back light inverter board. Normally in lcd monitors you can see three circuit boards. power supply, mother board, and the inverter board. If available then try to replace the inverter board. There are high voltage transformers in this board. There is a chance for its winding get short. You will not get the transformer in open market. Try for the inverter board .
ok

Jun 09, 2011 | Sanyo 42K30E 42 in. TV

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