Wondering if my iPod's backlight is going out and whats causing it?

A couple days ago i noticed my iPod video was dim, i tried to change the brightness but nothing was working so i restarted it, which fixed it temporarily, i then went along with my business and forgot about it, last night it did the same thing again, but this time i was changing my brightness and the backlight died and when real dim and was flickering, my question is does anyone know if its caused by the logic board or the lcd panel itself? I haven't tried to restore it yet but it doesn't seem to be a software issue since its happening in both iPod OS and Rockbox. Just can't figure it out and would like someone opinion before i go and replace the screen to find the logic board is the culprit. Should i just give up on it?