On the Home page >Live Route section, you can see how many jukeboxes are playing, idle, paused, turned off or offline.  

By clicking the number in each status, you will be presented with the details for each group of jukeboxes (Location name, ID, status, and since date).  For jukeboxes that are paused or turned off, you will also be able to remotely UNPAUSE or TURN ON those jukes by selecting them and clicking the corresponding button. 

Note that only OS2 (Virtuo/Playdium/Angelina) and G3+ jukeboxes (4.7x + software versions) will appear in the Live Route status buckets. Gen3 jukeboxes (3.9x software versions) do not support this functionality at this time.