so i pulled an old hubitat i got a couple of years ago out of the box to try and sandbox a couple of devices that are not working on my c7.
apparently its an old c3 with a stick..
gave it a staic ip and it boost up gets the ip but i cannot get anyfarther i can find it on the net by mac and when i click on it it tries to goto the ip but doesnt respond.. if i goto the 8081 port it says "select one of the following versions to switch to" without any versions shown..
Being a C3 is normal to have a blue light. However, looks like it is running an older version of Diagnostic Tool. See if you can update the Diagnostic Tool by going to this page:
hubIP/hub/cloud/updateDiagnosticTool
Also, if the hub was reset, you may try to get started here: