I hope I'm not being a pain in the neck with all the questions but I'm still having doubts that my machine is working right. Last night I was out hunting and my machine would act like it went dead. I have been having this problem and when it does I remove the battery pack and replace it and it starts working again. Last night it was going dead and I would very lightly (very lightly) tap on the battery pack and it would start working again. Then It started literally blowing my ear drums out. It would kind of make a clicking sound then start at a very high but quiet tone that would build to very loud (kind of reminded me of a siren) then make a extremely loud growl and quit. This happened several times and I had to put it away as I was afraid I was going to fry it. Could it be a bad battery pack? I didn't get the rechargeable battery pack with the machine when I got it. I bought it from my dad and he offered to take any repairs that needed to be done off the purchase price. I talked to the closest Minelab dealer and he said the closest place to have it looked at is Chicago. I've tried cleaning the contacts in the battery pack and the headphone jack and that seemed to help for a little over a day. I also thought that it might be bad headphones but I have my Ace's headphones and it does the same thing with them. I also took it out to my coin garden and even with a slow swing (4 seconds per swing one way) I can't get it to hit on 3 and 4" coins very well. My Ace has no trouble with these. I'm at my wits end. I'm going to take it to the Minelab dealer tomorrow to see what they think. I just want to learn this machine but when I'm doubting that it's working right it's taking all the fun out of it for me. Does anybody have any ideas?