After 5 weeks at the Minelab repair dept.,I finally got a call and found out what was wrong with my detector.When I first bought it on the classified forum it wouldn't stay powered up.I called the guy I bought it from and he said it's probably a battery problem.I cleaned the spring contacts with some electrical cleaner wwith a rod and a q-tip taped on the end.I also cleaned the contacts on the battery pack.It seemed like the problem was fixed after that.I went 4 or 5 times hunting in the woods and it starting acting up again.The last time it would come on and stay on the main screen but the only button that worked was the power button.In the guys defense that sold it to me,when I called him the first day when he said it was a battery issue he said he would refund my money.But after cleaning the contacts like he suggested I thought it was fixed.I don't think I put a total of 20 hours on the machine.I paid him $435.00 plus $27.00 to ship it to Minelab.The tech support guy that called me just now said the PCB(Printed Current Board),LCD(Liquid Crystal Display),battery contact board,keypad and shipping and handling would run me about $600.00 to fix it.That would put me over a $1000.00 for a 10 year old machine that was supposed to only have a battery issue.I guess he got the goldmine and I got the shaft.What would you do other than trying to sell it off in pieces to try and recoup some of my money?Thanks for letting me vent,cause I am very upset over this deal.The Minelab tech said there was problems way before he sold it to me.