Hi Matt, Keith,
My computer is a laptop so removing the drive won't work.
I've tried your trick with the device manager and I can see nothing that seems a problem... The number of USB devices is the same whether I show hidden devices or not.
I've just switched on the drive without connecting the usb and I'm still getting the flashing light. The drive isn't turning and the fan isn't working.
I fear I've just got a faulty unit. Looks like I'll just have to wait for a reply from PG support.
THanks to both for your help
Mark