I can't see the menu. Nothing happens just bluesomething else were damaged while replacing the backlight
check all connections, cables and flexes if connected correctly again
all screws inserted as well for cooling
usually the mainboard is the problem in such a case
Did you chose the correct video source in the TV´s menu or does it only show blue and nothing else, the Samsung logo is not shown as well?
I do have sound. Does that change anything?I can't see the menu. Nothing happens just blue