Thank you for posting to the Forums. I'm sorry to read that the Slingbox won't stay powered on. When the power light on the Slingbox does not stay on, it could have to do with a faulty power supply, a bad electrical outlet etc.
The first thing that I would do, would be to change the power outlet that the Slingbox is connected to. If that doesn't resolve the issue, I would look into replacing the power supply. Below I have provided an article that explains about the lights on the Slingbox. Feel free to take a look.
If you have any other questions, comments or concerns, please feel free to reply.
Hope this helps,
Sling Media Forum Moderation Team