Some dumb questions...
1) Has the 6416 PVR been activated by RCN? I assume yes since you talk about arranging a trouble call. However, when you called them to activate the unit I woud have thought they would have kept you on the line while the unit went through the multiple reboots and at least one channel showed up on the TV.
2) Since you are seeing an image on the TV via the HDMI connection from the PVR, I have to assume this is a 6416 or a cable problem. Have you tried running the coax cable directly to the TV, having the TV do an auto channel scan, and then seeing if the TV will display at least one channel. Most cable system have at least one clear cable channel that the TV should be able to pick up. If this doesn't work, then it is your cable connection and not your PVR.
I hope things work for you soon.
1) Has the 6416 PVR been activated by RCN? I assume yes since you talk about arranging a trouble call. However, when you called them to activate the unit I woud have thought they would have kept you on the line while the unit went through the multiple reboots and at least one channel showed up on the TV.
2) Since you are seeing an image on the TV via the HDMI connection from the PVR, I have to assume this is a 6416 or a cable problem. Have you tried running the coax cable directly to the TV, having the TV do an auto channel scan, and then seeing if the TV will display at least one channel. Most cable system have at least one clear cable channel that the TV should be able to pick up. If this doesn't work, then it is your cable connection and not your PVR.
I hope things work for you soon.