In the past 6 weeks, we've had 5 Mikrotik 900 / 9hpn devices lose their TX signal. Tower side, customer side, multiple towers, though 1x was the same customer twice. We gave that one a new power supply. In the couple of years before that, we lost 3 to that same thing.
To be clear: it'll go from the TX/RX being -50/-53 to -50/-83 from the AP side or something like that -- it's like the failed unit's transmit side just dies.
I'm just wondering if anyone knows what might be causing this? I'll be taking one apart shortly to see if I can swap parts from other failed radios, but if there's a known trigger, I'd like to avoid losing more.