I'm so sorry to hear that you're having the same problem. And, unfortunately, I've found no solution.
I actually bought a new slingbox to try on my network, and all the lights came on. Of course, I took it
back to the store (I wasn't going to pay $180 AGAIN. But it did prove that all was working right on MY side
of the system.
I'm quite surprised that such a 'simple' device (there must just be a small circuit board inside the box) can't
be traded in for a 'nominal fee' to replace the defective one.
I hardly even used the darn thing. But, time goes on, and before you know it, it's past 90 days and any remedy
I hope you can use technical support to convince them you deserve a break.
They will insist you use their $30 troubleshooting support to determine what might be wrong with your box.
And in some cases they might offer you a replacement box ($100 minus $30) for $70. But, you end up spending
You'll have to make that decision.
Best of luck.