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No video from tv I have replaced the mainboard,t-con and backlight

Lc-43le653u

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I would think that was enough wasted money and you should just go ahead and stop the bleeding and replace the TV, new ones are very cheap, that goes double in this season

Posted on Dec 02, 2016

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Posted on Jan 02, 2017

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I have a Samsung un32eh5300fxw with a non-working backlight. I'm unsure on this model has the LED backlight driver is built into the power supply, mainboard, or the t-con board.


Take off the rear and check the high voltage circuit. 120 volts enters follows by a fuse into a small high voltage transformer, then on the other side a capacitor (100 uf rated 450 volts). Check the DC voltage here. I got 380 volts. Should be at least 390 volts or more. If anything less, you will need to replace this capacitor. I used two capacitors from some old power supply - 150 uf and 220 uf rated at only 400 volts connected them in parallel and TV is back to normal.

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I don't have a service manual for that set so I'm only able to help on a limited basis...Have you tried the flashlight test?...if the backlights are out then it could be a backlight driver board if it has one? or defective LEDs. See what you have for voltage going into the panel LED's

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The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
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1 Answer

Replaced the power supply/backlight inverter board and T-con boards on my Samsung 37" TV Seems worse than before


hi this is usually is a tcon board fault, but it can also be a bad panel, if it's flashing could a mainboard fault thanks

shaun

Feb 27, 2017 | Samsung Televison & Video

1 Answer

Hi, I have a faulty Samsung UE40F5500 LCD TV with no picture issue. Would a new mainboard fix the issue?


Hello Check the capacitors, if they are swollen on top, replace them
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Apr 25, 2016 | Samsung Televison & Video

1 Answer

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Hook the Tcon cable back up and do this. With a program running on the TV, shine a flashlight in the screen. If you can't see movement from the program, then the Tcon board is bad. you can get parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

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Testing TV Backlight LEDs - YouTube

? 4:44
https://www.youtube.com/watch?v=eEJoPCa7Kt0
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... explaining easy way to test individual LEDs on a strip from aTV backlight. ... Sharp LC-60LE820UN TV - LED Strip Testing - Long Version ...

IT02 - How to Test LED Backlight - YouTube

? 0:55
https://www.youtube.com/watch?v=YmSI2N6BGPA
May 20, 2011 - Uploaded by LCDPARTS
How to use IT02 to test Laptop screen LED backlight.

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