I have a Gamecube Service Disk that I obtained from an Authorized Nintendo Repair Center. It's in a regular GCN game case and has a printed white and blue cover. The back of the cover has instructions for using the disk and running the diagnostics. It is version number 1.0/03 ...The disk runs normal diagnostics like most of the test carts from earlier Nintendo systems. I thought this should be added to the GCN section. I'd be happy to post a pic if needed. Thanks.