Which model of Regency mobile radio do you have? Many of the early Regency slope front models with the flat touch pad had major issues with the contacts under the overlay failing. Just to confirm this is your problem. ground you your mike hangup button to a good, known ground source and see if it will scan. If so, you mike clip needs to have the ground fixed. If not, you can try reinitializing the radio. I don't remember the exact sequence but it should be in your manual. That will sometimes fix the problem. If that doesn't work, you've probably had a failure in the scan button. If you like tinkering with radios, they can sometimes be fixed but the Regency is now so old that it's really not economical to repair them any longer.