I understand that you are having some issues in order to get the connection to your Slingbox Classic ever since you reset the Slingbox itself.
Even though you have included some details, we need to know about the Slingbox Classic network light. The following links will provide you with the steps to follow according to your Slingbox behavior.
On the other hand, if the Slingbox shows a solid power on light but no network light, the issue might be related to a faulty power adapter. If this is your case, I recommend you to check this link in order to get a replacement for the Slingbox Classic Power Adapter.