picked up a new (used toy) and have a problem. I've got no noise from the speaker with AF gain all the way up, and squelch all the way down, no signal at external speaker or headphones. I've verified it does RX/TX in FM mode testing with another radio, s meter indicates signal reception, and tx works as well, audio come through. Before I start opening the hood on this, I thought I would ask in here if anyone else has dealth with a similar issue. Thanks!