Hello, I have RB951G-2HnD and I noticed strange thing - when I loaded the device with some wireless traffic it produced strange sound - like hissing, fizzing etc. I was first thinking it is something about power inductors (maybe cracked and loose one etc) but when I opened the case, the sound was comming from buzzer! What the hell? Some induced crosstalk? Nope - I measured accross the buzzer hard 3.3V and the ripple on 3.3V caused by wireless caused this strange noise!
But why it there 3.3V in idle? I was curious how it changes when it beeps, so I unchecked "silent boot" in system routerboard setting. And the noise stopped! I measured voltage again and there was 0V!
Why the hell is constant 3.3V on speaker when you select "silent boot" in system/routerboard settings?
RoS version (6.23) (latest)
Current firmware:3.19 (latest)