It seems that you are having some issues with your Slingbox SOLO since it does not power on.
The reported symptoms lead us to think that the issue might be related to a faulty power adapter. With this in mind, I recommend you think about two options: first, take the unit back to the store and test it out. This test will allow you to determine if the issue is related to the power adapter or the Slingbox core unit itself.
The second option is to give us a call. We will offer you the available support options according to your Slingbox activation date. Once you get any of the available support options, we will apply the necessary steps in order to verify if you have a faulty power adapter or the Slingbox itself. In any case, the following article will allow you to get the contact information:
Hope this helps!