Question about Dell E172FP 17" LCD Flat Panel Monitor

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E157925 inverter board won't light up lcd screen What are the usual problem components?

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Typical failures in DELL LCD monitors are: cold solder joints, bad fuse (still has continuity with high resistance), shorted MOSFET/B-POLAR transistors, bad caps, lamps assmblies.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Replacement board: http://www.lcdrepair.us

Posted on Oct 24, 2010

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Posted on Jan 02, 2017

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POLAROID P40LCD12 SCREEN AT BOTTOM COMES ON BLUE FADES THEN GOES GREEN ABOUT 5 INCHES LOST ON BOTTOM TV WORKS OK BUT THE SCREENS STARTS BLUE ABOUT 5 INCHES FROM BOTTOM THAT FADES AND TOP HALF PIC OK BUT...


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.

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Tv is dim and can't brighten


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.

Apr 28, 2017 | Televison & Video

2 Answers

I have a VIZIO 60 inch tv with problems on the screen, the right side does not see the image and on the left side if, who can ?? it has a solution??


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...

Apr 26, 2017 | Vizio Televison & Video

2 Answers

I have an Element tv that has no picture, good sound but basicaly a black screen. Do i need a didgital board or a main board?


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.

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2 Answers

I have a lg55la6200 led/lcd smart TV. When I turn it on it stays on for about 15mins and then the screen turns off but sound still on. I have done the flashlight test and can see the picture.


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.

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1 Answer

I have a LG M2262DL LCD TV/Monitor. When I switch it on I initially have a picture and sound. Usually within seconds the screen goes blank but the sound is good.


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/

Dec 08, 2014 | LG Televison & Video

1 Answer

The picture on my tv is completely dark, but the sound is working fine. how can i fix the picture? because it's a fairly new tv


Hello
Keep a close look to the screen, and see whether there is any trace of picture on it. If it is there, you can see pale shadow of it moving. If it is there, be sure that the backlight is not there. Thhere is an inverter board to energise the CCFL lamps used as backlight component. If the inverter board got faulty, the CCFL lamps won't light up, and no brightness will be there with LCD TVs. Check it. OK.

Oct 22, 2011 | RCA L26WD12 26 in. LCD TV

1 Answer

Philips 32pf9641d/10 fault works well for 90 mins then goes black still images on screen but no backlight ? power supply or inverters? if inverters can they be repaired or replacement only,


Hi.

As you said when there is no backlight the problem is either inverter or power board. In some case the main controller board may be responsible.
You need to test the parts to find out what part is responsible. Testing is done tracking voltage from PSU to inverter. Voltage to inverter is usually supplied by the higher VDC line from PSU. Here broad description of how to test the three parts: Before proceeding...
The TV can be repaired at component level or replacing boards, depending on your skills and experience. If you want to repair at component level, after diagnosing the faulty board you test components and circuits individually. In that case to test inverter in full you will need an oscilloscope to read the phase of inverter AC section (oscillators or IC must be tested).

Note: If Inverter has voltage out to CCF lamps, then the parts mentioned above are OK, in that case you have a faulty LCD panel. The TV is usually not worth repair as the LCD panel is expensive. LCD panel faults are not common.

Here replacement parts for most flat panel TV models:ShopJimmy.

See also:
PartStore

Regards.

Ginko.

Sep 20, 2011 | Televison & Video

1 Answer

When the computer comes on it starts fading out then it goes blank


Laptop? The Inverter is going bad. (Screen Inverter)

An LCD screen cannot produce enough light by itself. It needs an additional light source.
A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp.

Similar to the Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
(Average Backlight is approximately half the thickness of a No.2 pencil, and 3 to 4 inches long.
There are many variations, however)

An Inverter is used to convert the electricity provided by the laptop, for the LCD screen, and Backlight.

90 percent of the time the fault is a bad Inverter.

The Inverter is usually located behind the Display Bezel in the Display Assembly, and at the middle/bottom of the LCD screen.
It is a small circuit board.

Example of a typical Inverter,

http://www.laptopparts101.com/screen-inverter-board/

[The Display Assembly consists of all the parts that make up the display.

A) LCD screen

B) Display Bezel (Thin plastic frame in front of the LCD screen, and surrounds the LCD screen)

C) Top Cover (Top plastic piece of laptop)

D) Screen frame (Metal frame that resembles a picture frame. Surrounds the LCD screen.
{The LCD screen is composed of layers. This frame keeps them in an aligned state)

E) Hinges

F) Hinge Brackets

These are a few of the Display Assembly hardware components.

What is the laptop manufacturer's name, and Model Number?
(On the bottom of the laptop is the Model Number. Sometimes referred to as Product Number. P/N)
If I knew this information I may be able to provide a link to a free Service Manual

For additional questions please post in a Comment.
Regards,
joecoolvette

Jul 03, 2011 | Computers & Internet

1 Answer

Hp Pavilion dv1000 Black screen


It is either the inverter board or the bulb

If it looks pink in color than it is the bulb and that can be quite the intensive project to replace

If it is the inverter board than that is not so bad and you can pick up an inverter board on eBay usually for around $10 to $20 and that usually installs right under the LCD screen (usually screwed to the LCD screen)

The inverter board is what powers the light bulb the data cable is totally separate function.
If you can see data on the screen with a flashlight but there is absolutely no light coming from the screen at all ever than it is probably just the inverter board

But there is a possibility that you could order the inverter board and have it turn out to be the bulb and if that is the case then unless you are very comfortable taking apart laptops then maybe a new screen would be best since you practically have to take apart the LCD to change the bulb.

But screen cost around 100 to 150 on eBay so if you decide to do that then might as well try for a deal like this: (I just spotted this on eBay and it is for entire new top half of laptop with glossy screen and inverter board wire harness and all for the same price or less than just the screen http://cgi.ebay.com/HP-dv1000-Pavilion-14-1-BrightView-Glossy-LCD-screen_W0QQitemZ310102538774QQihZ021QQcategoryZ31569QQssPageNameZWD1VQQrdZ1QQcmdZViewItem#ebayphotohosting

That is guaranteed to solve your problem for sure.

Nov 24, 2008 | HP Pavilion dv1000 Notebook

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