Fix for Dim/dark Digital Odometer GM?

I have a 2000 Chevy monte carlo and my digital odometer went from being occasionally dimmed, to now being completely blacked out. I had a couple of friends told me to add a resistor to the odometer. Is there any fix to get it back on? I would rather not pay the $200 to get it repaired locally, if I can do it myself. Please help. Thanks!