Thanks for reaching out to us in the land of the forums. We do apologize that you are having issues with the power. We do hope you've contacted us since you posted this, but on the off-chance that you're still having a problem - just call us! We want to help.
Be sure to have the serial number from the bottom of the device, as well as the manufacturer of the Slingbox AC power supply (the wall adapter) when you contact our support agents - it will say either "Ktec" or "V-INFINITY". Having that information in advance will help us serve you better.
The Slingbox Moderation Team