Question about Samsung LN-T4665F 46 in. LCD Television

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Need a remote fix for no picture but still have sound for samsung

I have a samsung ln-t4665f tv the picture turns black after a couple seconds, but i still have sound. last time a remote code fixed the problem

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Check if the back lamps are still on when you lose image, all you have to do is get close to the screen and make is totally black and if is not that means you have a back light working, but if the back light is gone you may have a defective panel.

talked to samsung TA about the same problem I had and the recommend to replace the power supply first to confirm a defective panel because a panel is quite expensive

Posted on Jun 15, 2009

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My Samsung TV model LN-4665F will not turn on. Is there a reset button i'm not seeing, or perhaps an internal circuit breaker or fuse?


Support - LCD TV LN-T4665F ' Samsung TVs

www.samsung.com > Home > Support
Samsung ElectronicsVisit Samsung today for LN-T4665F. You'll find product and support ... Manuals. UserManual ver.1.0 (EN,ES, 28.06 MB). Apr 26, 2011. Download (pdf)

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Look for bad caps (leaking/bulging top) in the power supply module. Make sure to replace them with good quality caps such as PANASONIC FM/FC series.
If you are going to DIY and have proper tools 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

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Parts: www.shopjimmy.com

Jul 01, 2010 | Samsung LN-T4665F 46 in. LCD Television

1 Answer

Samsung LN-T4665F when powered on picture is ok for 4 secs or less then screen goes black. Sound ok. I think the video is there just no back-light. Following some online advice I replaced the power-supply...


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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could be just a few bad capacitors on the power supply, if you want you can do a visual of the power board caps will appear swollen on top and are easy to solder in cost about $1 each
value is 1000mf at 16volts usually replace four of them

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1 Answer

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check if the back lamps are still on when you lose image, all you have to do is get close to the screen and make is totally black and if is not that means you have a back light working, but if the back light is gone you may have a defective panel.

talked to samsung TA about the same problem I had and the recommend to replace the power supply first to confirm a defective panel because a panel is quite expensive

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1 Answer

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