Dang it! I opened a service ticket, but thought I'd try here as well. My HT502 stopped responding today with very ominous looking symptoms. Both the amber and green lights on both my LAN and WAN ports are constantly lit. In fact, both stay on constantly regardless of whether a cable is plugged into them or not! I think something fried, but on a hunch I've unplugged it for a while in case it got too hot.

Suggestions?

==== Text of Service Ticket ====
Today my Grandstream HT502 stopped responding. It will not register regardless of whether I have it behind the router or in front of it. I have repeatedly disconnected the power, waited 30 seconds, and reconnected it to no avail.

The Power, WAN, and LAN lights are constantly lit, but Phone 1 and Phone 2 are not.

IMPORTANT: The amber and green lights on both the WAN and LAN connection are ALWAYS ON. They stay constantly lit regardless of whether there is a cable in the port or not.