Boat won't start...NEED HELP!!!

I'm selling a boat for a friend who moved he and his family to Uganda for 3 years to help AIDS victims and their families. He has a 1999 SeaRay Sundeck 240. I have a buyer...crazy thing is I can't get the thing to start! Not only that, everything at the dash is dead, lights won't work, etc. The only thing that works is the bilge pump and trim which is hard wired to the battery. I'm looking everywhere for a bad fuse or breaker and nothing. I can't find a perko switch or anything like that either. Anybody have any ideas on what/where I should check? I'm thinking maybe it's a bad kill switch at the throttle where the lanyard ties in...but not sure. I'm at a loss and the buyer is supposed to be coming today to pick up the boat and deliver a check!!! Crap!!