Went detecting this morning and it seemed like my ctx just wasn't performing up to par. Found two shallow coins that didn't produce a good signal. So I put a penny on the ground and ran the coil over it and nothing. Changed to my 6 inch coil and same result. Put my pro coil back on and still acting up. Decided to do a master reset and turned it off. Went to turn it back on to do the reset and it wouldn't turn on. Changed batteries and still won't turn on. Will be calling minelab in the morning. As a side note, I have had a couple of instances in the last couple of weeks when the ctx wouldn't turn off. Also, my son has been whipping me badly everytime we go out with his etrac. Last year after I got it, I was finding a lot of good finds and getting great depth, but this year has not been the same, so wonder if this problem hasn't been brewing for a while. I got a Deus coming from Vance. Guess I ordered it just in time. Will let you know how it turns out.