So here's the story. Sent my unit in for the the ribbon repair(not pioneer) got it back and installed it today. When I put in the east coast disc I get "incorrect disc please insert appropriate disc" So all I can figure is I loaded the 50mt disc about a year ago(to upgrade) but that wasn't the one the unit came with. I don't have the original discs (were they the 40mt?) So what should I do now. Everything else works,ipod,dvd,sirius,xm just cant use the nav

A few things could have happen. They might have upgraded the unit to the New 70's disk. If so, you will only be able to use those disks. You can downgrade the unit by going into the ROM. But like you say, you need the disks. The best thing is go to ebay, get the M70 disks and upgrade it. They are around $20-$30 bucks for the east/west copies.

Rob