Disconnected and removed equipment so work could be done to the house. Reconnected equipment and trigger to amp not working. Checked amp, rear switches are in correct position. W/O trigger I can turn on equipment manually, no problem. Checked trigger out with meter from BP-19 and had -5.6vdc??? With preamp in either Standby or On. I’m thinking preamp has a problem? Or is it the nut behind the remote? LoL. Any recommendations? Thoughts?