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50L1400U going dark at bottom half of screen - Televison & Video

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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...

Posted on Apr 29, 2017

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Posted on Jan 02, 2017

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1 Answer

Tv model 50L1400U no picture


not sure if this link will be any use to you but have a look.
Tv model 50L1400U no picture Google Search

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1 Answer

Toshiba LED tv 50L 1400U lower half of screen dark shading and increasing day by day.


According to the service manual this set has 2 separate power supply voltages for the LED's and it sounds like there is at least one bad lamp in the panel, if you have a volt meter test the 2 and see if one is at a lower voltage than the other...one other possibility would be if you have Tcon board issues

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I have a 75" Samsung LED TV, and the top position of the screen is going dark, is that a power supply issue?


Samsung TV half the screen goes black or dark - YouTube

? 0:38
www.youtube.com/watch?v=Mmu5wq6LVgM
Jan 28, 2012 - Uploaded by DaReal2Face
Samsung TV half the screen goes black or dark. ... My samsung 40" - 14 months old does this on the top half of the screen. .. ****** 12 month ...

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1 Answer

Lcd tv half screen dark


my friend,your prossesor is not working the way it should be,thats why your half of the screen is dark and sometimes goes off, bring it repair shops and there'll get it fixed.

cheers

Dec 24, 2013 | Televison & Video

1 Answer

Display half of screen


screen back light on the other side is busted which need replacement.

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1 Answer

Vizio lcd flatpanel tv with dark background


If half screen is affected it will be either a board (LCD and Plasma have different names) but in those one board drives each side of the screen unit--worst case is the display panel itself which is fatal from a cost point of view.

May 25, 2012 | Vizio VT Televison & Video

1 Answer

I have an lg model 50pq60d-aa and every now and then the bottom half of the screen will be a dark shadow what could this be?


either the screen is going bad or the tuner board try useing a dvd or vcr if it still does it the screen is bad

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1 Answer

Toshiba Television


If it has been happening slowly, it is likely from the decay of an electrolytic capacitor.
If it happened suddenly, something else in the vertical deflection section has gone bad.
This isn't going to be a DIY repair as it will require a bit of test equipment to find.

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1 Answer

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Suspect the Light Engine part # 939P977010

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1 Answer

Dark bottom half of screen and dark patch in corner


Thanks for the picture - that's a big help.
It looks you have the dreaded light tunnel collapse common to all LG1.gif DLP TV's. Inside the light engine there is a square tube made up of four mirrors. These mirrors deform and crack with the heat of the lamp. They fall down over the light aperture and cause a shadow of varying degrees. It is fixable now at a realistic price ( used to have to replace engine) as LG have made the parts available. It would take a competent tech around three hours to complete or if you are technically minded you could do it yourself. I hope this helps.
Hope Ya Fix It!

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