93 Jimmy digital dash

My digital speedo and odometer quit working, seems to me somewhere on this site was a post on how to change out the board. Can some one either tell me the best way to get to the board and replace it? or direct me to the post. Thanks Jeff

I had a 94 that went dark. found a guy on EBAY who sent me a new chip if I sent him the old one for $50 -- I unplugged and plugged in the new one - zing... everything's fine. Dealer wanted $800 -- had to remove the dash front, but it wasn't too hard.