As I understand, you need a replacement power supply. You can purchase a replacement part using the Online Store. However, we will be able to send you one, as mentioned on our web site:
Announcement: Having trouble with your Slingbox power supply?
Just call us! We want to help you fix it.
Go to this page for Sling Support Contact information:
Check the contact widget on the right side for the appropriate toll-free number for your area.