Hi all. I have 4 Sonos zones and 5yrs of largely trouble free use. Went away for the weekend - upon return I had to reboot Sonos as the iPhone controller wouldn’t connect. Finally got most zones working but one Sonos Play 3 ( TV surround speaker ) and 2 Play 5’s ( Stereo Pair) simply won’t connect. I’ve removed the TV surrounds but one Play 3 still won’t add. And I can’t find the Play 5s at all. I’ve now realised these three speakers don’t have surge protectors - the rest do. Doesn’t seem like a coincidence. Lights are all working on the three problem speakers so may not have totally fried them. FYI, just realised my subwoofer was plugged direct to power without a surge protector but it’s still working. Maybe it’s more robust? Any thoughts on how to tell if that’s the problem? Thanks in advance!