Is to never sub unless Samsung says it's OK. And they might not say unless you are "in." As in the Samsung authorized shop. Try Shopjimmy.com and samsungparts for the right parts.
This isn't a TV repair forum so generic advice is all I see plus notes to let Samsung fix it.
The backlight on this UN46EH5000 Samsung LED TV would go on/off intermittently but the TV was still functioning. Although there was no picture, there was sound and whilst shining a flashlight on the screen the picture could be seen. Research seemed to point to the Power Supply Board being the culprit since it also controlled the LED power. The board in the TV was a BN44-00497A board, and I purchased what was said to be a "compatible replacement" from a vendor. That board was a BN44-00667A. When I popped the board in, there is no power to the backlight at all. Picture can be seen with a flashlight and sounds are also normal. Figured it may have been a faulty board so the vendor sends me another one and same issue. However, when I put the original BN44-00497A board back in, the TV works fine until the a certain point in time when the notorious backlight goes off and back on as it pleases. I am assuming the BN44-00667A board is not as compatible as it was thought to be? Thanks in advance!