Not sure if I have a problem with my X-1Probe or my EX 2 . When I hit the switch over to pin-pointing mode and start pin-pointing the detector locks on to a high tone.It won't stop making this noise ( constant sound ) even if I hit the switch back to the detecting mode . The only way I can stop it is to turn the detector off . when I turn it back on it seems to work fine , but it will happen again when I go back into pin-point mode . This has happened the past few time I've been out detecting . Any Ideas what's wrong .