Having problems using an led backlight ambilight? strip

i took a tv apart, and i am trying to light an led backlight strip thatr was in the tv. Not sure what I am doing wrong
? I'm hooking it up at 5v and no matter what sketch I run, i can't get them to light? Sorry about the newbie question

Start by getting the schematic from the tv or the display model number and look it up, not everything works on 5V.