My backlight on my sidekick '08 has stopped working.

The backlight on my LCD screen on my tmobile sidekick 2008 stopped working. The phone still works in everyway, except the keypad doesn't light up, and I can hardly see anything on the screen because of this. I've read that I might need a new LCD screen. Is this the only possibilty or are there other potential ways to fix this issue, depending on the cause? It's been this way for months now and I've been using one of my 7 old razr's and not the sidekick because I couldn't afford a new phone, and don't have a warranty on it. At this point I'm about to give up because my razr has stopped working as well, as they always seem to do! Any information would be greatly appreciated.