Looks like you have a stuck headphone jack switch. This problem has been posted in the forum numerous times. Do a search for “Headphone & 996” to see what others have reported. You’re going to have to send the unit back to Uniden for repair. Expect the unit to be gone for at least 30 days for repair. I had the same thing happen to me and since then I don’t dare use the headphone jacks on any of my Unidens.
It’s a shame; you pay all that money for a high end scanner and a simple item like a headphone jack switch breaks on it. I had tons of other electronic devices which use headphones and never had this problem. I guess its cheap parts.
