So I dive a Cobra 1. and I Love it. My Buddies Cobra 1 suddenly started displaying Er (Error) and has a recorded Max Depth of 348ft (no way it ever saw that). So he went and picked up either a brand new 1 or a 3 (I forget which), but he gave me his old 1..........if I had to guess, the depth sensor took a crap. But the question is, is it a Door-stop? or is there something that can be done (like sending it into Suunto).......