Question about Gateway FPD2275W LCD Monitor

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Ccfl inverter board

Hi, I need to replace a blown inverter board . I have identified the inverter as being mounted on the main board ( not separately) its a viewsonic lcd monitor.

a few questions:

How do I know which parts to replace? How can I fault find the inverter?

Which part usually blows when an inverter stops working?

any advice appreciated

Thanks

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Where can I buy a new transformer

Posted on Jun 08, 2008

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The most prevalent failure on these boards are the transformers and or the ic that controls the frequency of the lamp drive. More times than not you will find a bad transformer.
srich

Posted on May 23, 2008

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Posted on Jan 02, 2017

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Model number 32dc99 horizontal lines to circuit boards which one do I remove to get rid of the horizontal lines


Usually horizontal lines are cuseed with its back-light system. If it is CCFL backlight type, check for weak CCFL lamps. 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 digital board.

Oct 19, 2017 | Televison & Video

1 Answer

LN-T5265F has a 5 inch section horizontally at top of screen that goes partially black.


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/ 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.
If the set's back-light is of CCFL type, check the CCFL tube at the top part of the screen for any flickering. If so, replace that lamp.

Feb 10, 2017 | Televison & Video

1 Answer

Toshiba 32bv500b shady screen lines across screen is it the t con board is a way


Back - light problem. If the back-light type is CCFL lamp, check all the CCFL lams for weak emission. 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.

Jan 12, 2017 | Toshiba Televison & Video

1 Answer

Have a dark band horizontally across vizio tv. Appears to be a backlight, but not sure how to fix


Could be a bad CCFL lamp, if the set usess CCFL back-light system. 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.

Jan 08, 2017 | Vizio Televison & Video

1 Answer

I have a Hisense 50h5g 50" tv, I have sound but a black screen it passed the flashlight test so I do have a picture just no backlight Iv replaced the power, tcon, and main boards, still have same prob


If the back light is CCFl type; check and replace all CCFL lamps and back light inverter board.
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.

Sep 15, 2016 | Hisense Televison & Video

1 Answer

Emerson model lc401em2f line in center of tv how do I fix


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/
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. If the back-light system is with CCFL lamps; check and replace the damaged CCFL lamp; at the centre of the screen.

Nov 27, 2015 | Emerson Televison & Video

1 Answer

Hi, I have acer aspire 5520,2 Gb RAM... When I turn on my acer,everithing works just fine,exept monitor,it remains black,When I try ecternal monitor,it works fine,windows wors fine to,everithing but the...


Aspire 5520 has LCD Display. The screen displays becomes dark/ dim if there is no backlight.
There are two parts responsible for lighting the display. First is the CCFL (Cold Cathode Florecent Lamp), which is the back light and the second is the Inverter board, which provides high voltage to the CCFL. These parts are inside the LCD screen. Either of the parts may be faulty or in some rare cases both. Also, the video data cable may be loose or faulty, which can be identified only after opening the top cover.
So, my advice is that you get it properly checked by any professional for replacement of Inverter or CCFL.

Hope it helps! Good Luck! Thanks for using Fixya!
CreativeTECH

Jun 22, 2011 | Acer Aspire 5520-5579 Notebook

1 Answer

Black band across bottom of screen


hi,
Is the black band is about one two inch thick 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 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 | Sharp AQUOS LC-32D44U 32 in. 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

I have a 5 year old pdp-5050sx Pioneer TV, it has a yellow on the screen that goes from the bottom of the screen to the middle of the screen and it is a few inches wide. the yellow bar is also few inches...


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.
Check the CCFL lamps too, for low light emission, if the backlight of the TV is of CCFL type.
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.

Aug 21, 2017 | Pioneer Televison & Video

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