Chosen Solution Hi OMG same EXACT problem here did you fix it? Please let me know what the problem was thanks. UN55H6350AFXZA I don’t have test light to check voltage. Nothing tried yet
HOT CAKES start by disconnecting the cable between the main and power board, if the backlight comes on then you know that it is good. Next measure connector CNM803 (should get ~13V) Next check connector CNL802 (0,0,334v,0,223v,0,223v,0). If your power supply has the right voltages for your backlight and obviously the backlight works if it comes on when you disconnect the main board from the PSU, that would leave the main board as the culprit since it provides the signal for the backlight enable....