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I have a samsung 60 inch led that passes flashlight test. power supply is BN44-00775A. does that board also drive the led's or do i have to find the backlight driver?

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If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" or the " power board number" of your device, in the "Search box at the top right of the Homepage" to get gathered related posts.

Posted on Dec 10, 2016

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Posted on Jan 02, 2017

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Samsung UN65EH6000FXZA (Version YH02)


There is three possibilities:
1. Defective back lights LED strip.
2. Defective LED driver section integrated in the main power supply.
3. the main board.

How to check it:
1. You need a LED back lights tester to check the strips, or open the panel, use a 3.7 V DC power supply to test each LED diode separately.
2. Use a multi meter to test the out put DC voltage from the connector to the LED strip between the + & - for each section, (like 1+/1-, 2+/2- etc.) it should read 140 - 220 V DC. (need power up the TV).
3. Un-plug the cable between the main board & the power supply, power up the TV, if you get the back lights light up, the main board is bad.

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3 Answers

I have an LG 47LN522-UB LED TV that stopped working after three years and need help diagnosing a problem with it.


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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1 Answer

I have a 50 inch Samsung Smart TV UN50EH5300 that went dead...so I replaced the voltage supply board and it came on sound but no picture.


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.

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1 Answer

Samsung UN40F6300 tv has no backlight. Passes flashlight test. already replaced main power supply board. Is there something I am missing?


Some time the LED back lights can become faulty. If o you have to replace the panel. Because the LED back lights comes along with the panel.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

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2 Answers

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Check ur led driver board and also a possible shortted led light

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1 Answer

Samsung LED TV (UN39FH5000FXZA) has audio, but does not have backlight. I replaced the power supply/ LED board with no success, could this be caused by the main board or the t-con board?


Hi Matt,
The fault lies with the backlight LEDs. It is common with these sets. If you open the panel and replace the failed LEDs, or replace the panei.
Good luck.

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1 Answer

I need help in fixing my 55 inch Harier 55D3550a LED TV. I would like to know if it the Mainboard, Power supply, LED Drive, or T-Con that need replacing. I listed the symptoms below


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.

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1 Answer

There is sound but no picture. No backlights but can see a picture in dark with flashlight test. LED panel # is D460D3-6Y43-COX. What part would I need to purchase? T


You have check the power supply first .To know how to check the power supply watch the following video. Normally led tvs power supply contains the led drive circuit too. Bot are integrated in the same board. The led drives circuit should have between 30 to 120 volts from the power section depending up on the brand and model number of the TV. If the the voltage is ok then you have problem with the Led driver section section. Either you can try to repair it or can buy a new power board.
www.electro-medical.blogspot.com


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1 Answer

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