Whine noise from SC PRO 2

I’ve had my simucube pro 2 for a couple of months now and it’s been working great. When I turned it on today it had a very annoying whine noise, almost like a fan, coming out of the wheelbase. When I put a wheel on, wireless Ascher or a wired formula Rexing, the sound is there; when I turn the wheel the sound oscillates and comes and goes, and when I take the wheel of it goes away.

Any ideas on this? I saw another thread with firmware update, I’m on the latest.