Hello all. Long time watcher, first/second time poster. I wanted to ask as I don’t know a ton about this kind of thing. I have had my federal signal PA300 paired to my BP100 speaker on my OBS ford f150 for about a year now. I recently had some mechanical issues and had some work done on the truck. Nothing regarding the PA/speaker system was touched, however it sat outside in the sun for a couple of months (the mic is mounted to the dash).When I got it back, the microphone no longer broadcasts my voice with the system in ‘manual’ mode. All other functions work, all sirens (wail, siren, you name it) and the horn/siren switch works. Even the little clicking on the receiver can be audibly heard throughout all ranges of the gain switch volume levels. For some reason though, I cannot get the microphone to broadcast my voice at all. Please advise. For reference I have what I presume to be the later style telephone/ethernet cable style microphone connection.