LG Voyager keyboard backlight

i have a basic voyager(black) with and qwerky keyboard. it only lights half the keys, how are the keys lit? and what should i replace to get the keys to all light up?

thanks

great idea i hope someone has an answer

thanks, if all else fails i'm just gonna tear parts out of the one that has a broken screen til the other is fixed. i just dont feel like distroying a phone and risking not having my back up anymore