It looks like the amp has gone bad and the dealer has no options for replacement. I also checked with Crutchfield to either bypass the amp or replace it and they had no solutions. What fuses and where are they located that may have blown, other than the fuse box by the drivers door? Don't want to upgrade anything but just a simply replacement to get the radio working. All other functions appear correct except no sound from any speaker, power going to everything, connections good and with all the speakers I assume the amp is in series with the radio and the most likely problem. Thanks in advance for any help.