Not sure why your posts are going missing but I am moving this thread to the technical support section.
If your power brick is making noise firstly try moving it to a different location away from other electrical devices (the brick and the wires too).
If the noise has just started and wasn't happening before it may be another issue. If the issue continues to occur please contact us on 0844 499 4000 for further assistance.
It's plugged into an extension, so I unplugged it and plugged it into the wall socket instead and it still made the noise. The only other things plugged in by it are my alarm clock and three different types of lamps. I can't move it any further away as I have my laptop on a desk.
I will give you guys a call tomorrow though, thank you