Thanks for using our Answers Forum! It sounds like you've pretty much covered all of the troubleshooting steps that we do for Networking issues. At this point, I would recommend you check out the information in this article
Hope this helps,
The Slingbox Moderation Team
Thank you for your response! Sorry it took so long to get a response. However, if you have went through all troubleshooting steps and are still getting the same results, I would recommend trying another Slingbox SOLO power adapter. Usually, when it comes to not getting a network connection, it is not an issue with the voltage in the power supply. It is usually an issue with the amperage. However, I am not certain how to test that. If you have not yet tried another power adapter, I would at least try that, to rule it out as a possibility of being the reason your are getting this issue.
Below is a link to our replacement parts sections of Slingbox.com:
Hope this helps!
The Sling Moderation Team