I am having the same problem -- I hold down reset for 1-2 miuntes and when it 'reboots' the power - network, and led horseshoe stay lit.
I can see it was assigned an IP from my routers DHCP.
I can see it on the network through the Slingbox setup webpage.
If I try to connect to it, I get a message regarding my password is incorrrect -- however, I am able to successsfully setup a new password in my account.
I have cycled the power several times (unplugging the power from the PRO-HD box)
I haven't changed any hardware or software on my home network -- one day it works, now it does not.
OK - I finally got things back up and working, but I am not entirely comfortable with the solution. This is what I did:
1 - I also have a SlingCatcher and noticed that the AC transformer on the SlingCatcher has a warning tab affixed to the power connector side stating
to only use that transformer on the SlingCatcher and not any other Sling products.
2- I was using the correct transformer on my PRO-HD, however, after flipping BOTH over and looking at the specs, they are identical !
3 - I have a filtered power isolator ( fancy surge protector ) and I unplugged everything it, and the circuit in which it resides. I plugged only
my Sling PRO-HD into the surge protector, held reset for 45 seconds, and reconfigured it through the website interface.
It now works. That said, this is the second issue I have had with the Sling power transformer, and after searching around apparently I am not the only one. Why does the Sling Catcher and the PRO-HD have the exact same transformer, but yet one states it cannot be used with the HD-PRO and the other says nothing to that affect? Why would they have the same specifications?
Fortunately, the specs, and the femae end connector are generic enough where I can purchase a third party transformer with much tighter tolerances from Radio Shack or elsewhere. Although I would like the past 45 minutes of my life back...