Just bought one of these keyboards a couple of weeks ago from scan and seem to be having an intermittent problem with it. When it first arrived I plugged it into a 4 port hub I have along with a bluetooth adaptor and a sensor for a generic media centre remote, after a couple of hours idle, or if being heavily used it seemed to be turning itself off. Assuming this was a lack of power I then bought a usb extension cable to plug it straight into a usb port, now the issue is less frequent but I can be assured that if I turn on the PC in the morning, then go to work by the time I come back around 10 hours later I'll have to unplug the keyboard and plug it back in to get it working again. The system isn't set up to sleep, only the monitor turns off, I've tried changing it around the ports, front and back and even unplugging the hub but I'm still having issues.
Have I perhaps missed something or is this going to need RMA'd? I'm reluctant to just RMA it for such an unpredictable failure.