Question about Samsung LN-T4665F 46 in. LCD Television

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Replace the power supply and the backlight inverter to my samsung has sound but no pictuer can u help

First replace the power supply got sound no picture. Then replace the blacklight inverter and Stella no picture help.

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  • Samsung Master
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Check whether CCFL lamps are good or not. Check whether the newly replaced back-light inverter functions well.

Posted on Jan 24, 2013

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Posted on Jan 02, 2017

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SOURCE: LN-T4061f samsung lcd no backlight, no sound, no picture

Replacing the capacitors would be a good start. Replace all the ones with the same capacitance and voltage rating even if they do not look bulge.
Let me know if you require further assistance.

Posted on Mar 14, 2009

budmrtn
  • 11361 Answers

SOURCE: Samsung ln-t4042h turns on, plenty of sound, backlight works,...

Check the fuses on the T-CON board and also verify that it does have 12vdc feeding it. If you look at your screen in darkened room you will probably see slight glow on the front of the screen.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

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

Parts: www.shopjimmy.com

Posted on Jul 10, 2010

  • 2 Answers

SOURCE: I have a Samsung ln

I have a 46" Samsung LNT4665 with the same problem. Originally had the power supply replaced but 1 day later I have this problem. Auth. repair shop says it's likely inverter, but apparently can't be replaced separately, must be replaced with panel ($700 , and labour on top) might as well buy a new TV.

Any suggestions? I have seen the inverter sold separetly on some websites, anybody try replacing that part?

Posted on Oct 24, 2010

dcramer531
  • 1654 Answers

SOURCE: my samsung has backlight and sound but no picture

More than likely, like me you have your Picture set to Dynamic mode and the backlight at 100%, maybe even DNR activated.
Here is what you do. Keep trying to turn the TV on, evertually it WILL come on, sometimes it might take 100 attempts over a couple of days. Once you get the TV to come on, do the following.
Each and every time BEFORE you turn off the LCD, change the picture back to Standard mode and turn off Digital NR and turn off DNIe, also turn the backlight to the lowest setting. The Standard mode will remember the backlight, DNR and DNIe values. You'll just have to change between Dynamic and Standard in the future after power up.
If you do this everytime you turn off the set, it will probably always turn right back on for you.
The Cause: The t-con board does not stay at 100% performance over time. It is susceptible to decay in performance due to heat damage. The t-con board runs hot to begin with, it runs hotter the more that is demanded from it by maxing out the video image settings. The t-con board also sits directly above the hot power supply and the processor on the t-con board has virtually no heat sink.
Lowering the video settings at startup allows the t-con board to function.
Samsung should probably release a firmware that throttles the video settings at startup

Let me know how this works for you so we can save you some money if possible.

Posted on Mar 07, 2011

TV #1
  • 129 Answers

SOURCE: Samsung plasma hpt5054x/xaa California no sound no

If you got no picture replace the buffer boards.

Posted on Mar 20, 2012

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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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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/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.

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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.
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You have to check all the voltages, that comes from its main power supply board, to its back light inverter board. These is one pin at the backlight inverter board; comes from the main board; which controls the back-light inverter to start and off. This voltage is generated at the main board, and send to the back-light inverter board, as control voltage. It will be best to contact any service technician. If you wish to get some details; check the site linked here.Viewing it in "Mosaic" will make surf easy.
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My samsung tv replace the power supply board. got sound no pictuer replace the backlight inverter stell no picture


You have to check whether the back-light inverter gets its proper voltages to function. There as many voltages that controls the back-light inverter. Check these is a skilled work. Contact any experienced service technician. If you are not familiar with electronics, do not attempt to repair. Whether you suffer fatal electrical shock! Instead, contact the nearest service center.

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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.
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Hello
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After a storm still have sound no pictuer. caps look good ,fuses check good .tv 23months old little usage.


Check to see if you have 24vdc comes out of the power supply, this 24vdc is used for the backlight inverter board, if you do have the 24vdc, then check the fuses on the inverter board.
You may need the power supply module or the inverter module.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=Samsung+LN-T4061F+

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
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You more likely to need to backlight inverter boards, thpower supply should have 24vdc for the backlight inverter board, the 24vdc power supply get the trun on command from the controller board, that is what should have been checked first. So look for 24v or measure it directly on the inverter board connector pin. The invereter board also has a couple surface mounted fusesYou can get the inverter board here but make sure to match the number: http://www.shopjimmy.com/catalogsearch/result/index/?q=LN-T4665F+&limit=100

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