I have a Sennheiser Evolution G2 100 (500 band) in a rack of about 16 mixture of Shure and Sennheiser brand mics. The receiver gets an RF signal from the body pack but doesn't receive an audio signal I switched out the antenna with ones from working receivers and the body pack I also changed the mic out with ones I knew worked. I tried changing frequencies to ones that worked on others in the rack. My next plan is to send it to Sennheiser for them to have a look at it/repair it unless anyone has any solutions here.