Superdrive has unexpectedly changed region
My six year old superdrive has been happily playing DVD's in my region (2) all its life - but now it has unexpectedly reset itself to region 1 and won't play any of my DVD's.
If I attempt to set the region back to 2 (unlock settings/password/reset) it seems to accept those changes - but the DVD won't play and the app closes.
I've attempted to change the region many times - it always warns me I can only make 'one more' change.
Any suggestions, please?
Mac mini