Then today, plugging in a mains powered USB hard drive into a front-of-case USB port caused a PC crash and there were some sparks between the port and the USB A cable as it went in. Neither the Z506's nor the drive have a real earth pin on their plugs. Both were in the same 6-way PDU, along with the PC and monitors.
This was reproducable, then was not once I unplugged the speakers from the PC.
Questions I have, any answers gratefully received:
- Is this a ground loop or something else?
- Is it fixable, and if so how?
- Should I RMA the speakers?
- Is there an alternative set of PC 5.1's that I can buy for under £100 which will not have this problem?