Chris, since it was a software issue I worked on the problem with the technical team by email and over the phone. The machine did not have to be sent back for an initial evaluation. The machine was declared dead and could not be remotely accessed to reinstall the software. This type of problem is extrememly rare and may never happen again.
To repair the unit it would have to be cracked open, the software wiped and possibly have the memory chips/boards replaced depending on what type of chips were used and what software was effected. The lockup may have also involved a hardware failure. Replacing the unit may have been cost effective but was also a strong show of customer support. I was treated very well and greatly respect the entire Minelab team and distribution channel.