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Old 01-05-2015, 02:46 AM   #1
white1991
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Default Dynex LCD TV has sounds but no picture.

Has sounds, back light is lit, but no pictures.

It's a Dynex DX 40L261a12.

The screen just went out.
I put the T.V in a pitch black room and flash a bright light on it at different angles and I cannot see any faint pictures.


Searched online for what could be the problem(s):
Bad inverter (I dunno how to identify a faulty one)
Bad capacitors(I see no bad capacitors on any boards)
Bad T-con (I don't see any T-cons in my T.V)

Anything else?

I'm tempting to buy a new back light inverter, but I don't (and can't) waste cash, plus I'm having trouble taking it out.

I'll post pictures once my phone is charge, if anyone wants to take a look.


Thank you in advance.
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Old 01-05-2015, 11:47 AM   #2
white1991
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Default Re: Dynex LCD TV has sounds but no picture.

After doing more research, it might be the T-con?

I don't see one in the t.v.
I uploaded 3 pictures.

Model number is DX 40L261A12
Attached Images
File Type: jpg IMAG0181.jpg (997.3 KB, 18 views)
File Type: jpg IMAG0180.jpg (1.04 MB, 6 views)
File Type: jpg IMAG0186.jpg (959.0 KB, 7 views)
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Old 01-05-2015, 12:03 PM   #3
budm
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Default Re: Dynex LCD TV has sounds but no picture.

It has integrated T-CON on the LCD panel assembly, nut we can still check for the DCV on them main board to see if the main board is sending the DC to the panel or not but we need better pictures of the main board, especially around the LVDS connector that goes to the LCD panel.
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Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Old 01-05-2015, 05:54 PM   #4
white1991
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Default Re: Dynex LCD TV has sounds but no picture.

Thanks for the reply

Here is a few pictures of the Main Board.
Attached Images
File Type: jpg image.jpg (1.33 MB, 6 views)
File Type: jpg IMAG0187.jpg (1.37 MB, 5 views)
File Type: jpg IMAG0188.jpg (1.41 MB, 4 views)
File Type: jpg IMAG0190.jpg (1.36 MB, 3 views)
File Type: jpg IMAG0201.jpg (1.52 MB, 1 views)
File Type: jpg IMAG0202.jpg (1.49 MB, 4 views)
File Type: jpg IMAG0200.jpg (1.40 MB, 1 views)
File Type: jpg IMAG0193.jpg (1.14 MB, 2 views)

Last edited by white1991; 01-05-2015 at 06:02 PM.. Reason: uploading error
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Old 01-05-2015, 06:05 PM   #5
white1991
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Default Re: Dynex LCD TV has sounds but no picture.

Also you said It has integrated T-CON on the LCD panel assembly



Could these be it?
Attached Images
File Type: jpg IMAG0197.jpg (899.5 KB, 5 views)
File Type: jpg IMAG0196.jpg (1.29 MB, 6 views)
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Old 01-05-2015, 06:40 PM   #6
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Default Re: Dynex LCD TV has sounds but no picture.

That is the IR Remote sensor board.
I need MUCH BETTER pictures around that connector on the main board that goes to the LCD panel, it must be clear enough for me to trace out the connections.
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