Got mine S1 last night and plugged it in straight away. Is it normal for it to be that loud? Also when it starts, the fan seems to be making some clicking noises, they sort of disappear over time as you can hear them anymore over the noise of the fan spinning, is this expected behavior?
are you sure the clicking noise isn't from the the board itself? when it doesn't have internet connection, clicking noise will appear.
100% sure, I had that "no internet connection noise" couple of times and its different. When I start mining, the fan tries to spin itself but somehow fails to do so and only after a minute or so starts to properly spin. Do you reckon the fan might be somehow broken, or is it the power supply to the fan thats causing it?
the other possibility is that the fan is just BARELY nicking the tips of the hex screws holding the frame to the heatsinks. when i swapped out the fan for another on my first-model unit i had to add a few thin spacer washers so that the fan could spin up without either getting stuck or making a loud terrible clicking noise 30 times per second.
presumably when the fan's up to speed it might push itself a millimeter or two back from the airflow forces and stop making contact. If this looks like your issue either check all the tensions of the screws holding the fan or buy a few cheap nylon washers and re-install the fan using one or two per screw