I understand that you are having some issues with your Slingbox SOLO since you cannot locate it on your home network, although it shows solid lights.
There are two possible reasons for this unexpected behavior: first, the security software running on your computer. Some security programs will recognize the SlingPlayer or the Slingbox as a possible "threat" to your network security. The following article will provide you with further details:
Secondly, this issue might also be related to the web browser version in use. I recommend you to check if your computer meets the requirements related to the supported Operating System and web browser versions:
Finally, I recommend you to disable the Wi-Fi connection on your local area network (LAN). Make sure to use a direct Ethernet connection between your Slingbox, your computer and the router. This test will allow you to confirm that your computer and the Slingbox are connected on the same local area network.
Hope this helps!