Samsung un32eh5300fxza tv has no picture. Has sound and if you use a flashlight you can see the picture.

1. Disconnect the cable between the main power supply & main board, supply AC to the TV, if the LED strips are OK, it should light UP, if not replaced all of the LED strips.
2. If the back lights light up, but no display or sound, replaced the main board.(after you re-connect cable).

The led driver AND the T-con board are bad. If you could see a picture with the flashlight then the T-con board would be good. It is not. The led driver can be on the main board or the power supply board. You can get these parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

Lg 50LN5100 UB TV Parts See the note about the power board and LED failure

Hi Ben,
Back light failure is a common problem with these sets. If it is so, I am afraid you can not repair it by yourself. You will need a qualified and experienced technician to handle it.

This problem is not that simple. Your set has LED back lights and does not use an inverter. It gets power for the LED lights from the power board. The manufacturers push the limits of the LED lights to get the maximum brightness. This can lead to premature failure. The light strips and the power supply are here:http://www.shopjimmy.com/catalogsearch/result/?q=UN32EH5300FXZA

I would have to guess that the Timing Control Board is defective

Sounds like 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..

Check and replace its T'Con board. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Check and replace the back-light LED strip. Contact any service technician. http://electronicshelponline.blogspot.com/

Power supply board is not the culprit - check out your inverter board which is responsible for the back lighting.