Sony A1 ILCE1 humming noise

[N10CKK]

I have had my A1 for a while now but after the latest major update (2.02) I notice that it now makes a low humming sound, like a cooling fan noise, which is quite noticeable in a quiet hide. I do not believe there is active cooling on the camera. Also, the battery now drains really quickly, likely as a result of whatever this is. I see that this issue is being reported by others too, but can't see any posts here. Sony and fellow photographers, what is this and how do I stop it?

[N10CKK]

Actually, I now find that the noise is coming from my Sony 400 f2.8 GM lens. It whirrs continually. It never did this until this week. I have been through the menus and I do not have anything switched on which I think would do this (for example pre-AF). It is draining my battery real quick.

[EMS_MO72]

Hey @N10CKK 

Do the same issues happen when you try another lens with the camera?

We need to eliminate the factors to know where are the issues coming from exactly.

[GordonT]

I get a similar noise using my A1 and 200-600 lens

[N10CKK]

It's definitely coming from the lens not the camera. I wonder if it is a gyro relating to IS. I contacted Sony and they weren't very helpful, just suggesting I send it in for repair. I've looked online and there are several people saying the same thing. Weird thing is that it only started recently. Never a problem before