I just wanted to update the thread with the latest on my VT4 troubles. I called Oceanic a couple weeks ago to see what the latest was since I'd sent the computer in for service about a month ago. They apologized for it taking so long, but told me they needed to follow up with Pelagic (a separate subsidiary located across the street) to get me the status. They called me back presumably with the status the next day, but I was unable to answer and for some reason they didn't leave a voicemail. The day after that I got a UPS My Choice alert that a package was on its way to me from "Oceanic Customer Service", so whatever they had done was complete. When it arrived, the service form indicated they had replaced the entire unit with another one. Not sure why it took so long, but otherwise I'm satisfied with resolution to the problem.