Have TV Questions? Ask a TV Technician
Hi , I`m jack
Perhaps I can help you with this and I`ll start by saying that NO you will not have any picture going through if you don`t have the correct board hence it will look exactly like the same problem .
This is not like it work half or not properly , this is it works or not at all so it will look exactly like the same problem .
You need the correct board
Which one of those is yours , click this link ; http://www.shopjimmy.com/catalogsearch/result/?q=un40eh5300
O.k then a few question on that
Could you see the TV's own menu with the original board ?
For that matter just re-install the original t-con although having some backlight and sound does sound like a defective t-con but one test is the TV's own menu .
If you can still see it then the main board is suspect
no problem but as I said above if you cannot see anything including the menu then you were on the righttrack about the t-con otherwise its a problem with the man board video processing the signal from external inputs if the internal menu can still be seen .
Use the link I gave you to ID your board and then use that part number to find it or let me have it and I`ll find it for you.
If you don`t have any more questions for now then please do take the time to rate my answer by clicking on the star icons at the top, then click on Submit , that rating gets me paid for my time and you can come back here at any time after rating for questions or help