Have a Roku Premier device that all of a sudden gives me Insufficient power errors. I'm using the power adapter that came with the roku, I have the device plugged into the wall and still receive the error. No other device that I own has had trouble with the same outlet so I think the issue is with the Roku. I've also had audio issues with it in the past that tell me it may be a faulty device. Only about 4 months old.
I have the exact same problem.