Try another console cable and hyperterminal software, check the COM port parameters. The Cisco standard console connection parameters are:
9600/ 8 N 1
I recommend PuTTY as a free and reliable alternative hyperterminal application.
An idea: I think You can check the successful boot of the C851 router: power on the router, wait some minutes and connect a PC to one of the switchport. Open Ethereal software and start a capture on the ethernet interface. You should see CDP packets sent out sourced from the router.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...