Is there a direct number to reach knowledgable tech support at Comcast? A buddy of mine is hooking up a receiver for his poarents and is getting "the channel will be available shortly' message. They are going from basic cable with no box to digital. The cable comes into the receiver then out to a vcr and then to the tv. Two times he called Comcast and they had him unplug the box for a few minutes and then told him to wait 45 minutes and everything should be ok. Both times same result. Any suggesitons?