I just got back from two weeks in the Riverina in NSW.
Just un-packed as a matter of fact,and had a peek on the forum and saw your problem... Not good at all!
I'm sure that you'll be looked after by the Minelab boys mate.
If you're stuck, and can come to Melbourne, I still have my Explorer II.
You would be most welcome to use it while yours is being fixed.

I haven't had any problem with my SE over the last two weeks, except a problem with an erratic switch on occasionally ~ early on the trip.
I pulled out the NIMH battery and gave the metal contacts a good hard rub with some coarse flannel, and it gave no further problem.
Low voltage has problems with poor contacts, and I think that sometimes the metal that they use for contacts sometimes have an oily residue from the sheet metal stock that they are made from.
I give my AA batteries a good hard rub also.
I thought that sometimes the display was missing some targets, but found that these were marginal targets that were giving inconsistent signals, these were actually bordering on accept/reject zone...
Had me a bit baffled for a while, I was beginning to think that my TID was playing up too!!!