Communications Support Forums

I've been beating my head against the wall on this one. About a week ago, it seems my local PD may have made some changes to their conventional system, possibly a new repeater - not sure, but they were moved to another regional channel for a few days. Since then, my previously-working XTS5000 and XTL5000 will not unmute. I thought they perhaps changed PL/DPL, but it appears that they did not. My HT1250 continues to work. I programmed up a new (to me) XTS2500 and have the same issue.

So to summarize, I have 3 separate Astro25 units that all refuse to unmute, while the HT1250 works fine. I also verified via my Pro-106 scanner that the frequency indeed has the same 85.4 PL it's always had.
Details:
Band: UHF-T (47x.xxx)
Type: Analog, Conventional
PL: 85.4
Radio 1: XTL5000 S-split, previously working on this channel, now will not unmute, but receives when pushing monitor
Radio 2: XTS5000 Q-Split (so slightly out of band), previously working on this channel, now will not unmute, but receives when pushing monitor
Radio 3: XTS2500 S-split, newly programmed, will not unmute, but receives when pushing monitor
Radio 4: HT1250 S-split, previously working on this channel

Do you think it could be a tolerance issue with the PL? The department uses XTS5000 and XTL5000, so I'd be shocked if it's a wider compatibility issue. I know there are documented issues with signal overload, but that is not the case here. The 3 Astro's are different firmware ranging from <10 to R17 for the 2500. None have been aligned recently, but it would be hard to believe all 3 would have an alignment problem at the same time. Any ideas?