My radio, was not working good, so bought a new one, on Ebay. Looked good and was a working radio, Went to put it in, and no sound at all. I did not tighten it all the way up, put power, and antenna to it, and tried it, no sound at all. Checked it out, see no problems, put in old one making sure wires worked, and it did, So keep trying, and the new radio had a different fader switch, than mine, it has 3 prongs, put it on and the radio works, Learned something new today, nice to have it work.