Here's what I've done:
The power light is on, and the Slingbox logo is fully-lighted. But the network light is off. What can I do?
Consider replacing the power supply
Very often the problems you've described are caused by a defective power supply. You have two options:
If your Slingbox is within its warranty period: contact Sling Media Technical Support. An agent can help you troubleshoot this problem. If the cause turns out to be defective hardware, the agent can arrange for a replacement for you.
If your Slingbox is outside of its warranty period: you can purchase a new power supply from the Sling Media Online Store. There's a link to the right for your convenience. Be sure to:
Click the Replacement Parts tab in the Sling Media Online Store.
Select the power supply that is for your specific Slingbox model. Using the wrong one can damage your Slingbox!
Important note: while the cost of a new power supply is fairly modest, you are purchasing it at your own risk. Sling Media cannot guarantee that replacing the power supply will solve this particular problem.