Cannot access router at 10.0.0.1 and cannot connect to 5GHz wireless network
I just had Comcast business internet installed in my place 5 days ago with the Cisco dual-band modem/router. However, since the beginning, I cannot access the 5GHz wireless network on any of my wireless devices (laptop, googletv, etc..). When I try to debug the issue, I cannot connect to the router via http://10.0.0.1 address in my browser (on the PC directly connected to the router with wire). The page keeps trying to load but gives up after sometime.
What could the issue be? Is this a defective modem/router? Even the Comcast installer could not get it to work at the time of installation and he said perhaps it had to do with my PC but clearly it does not seem to be.
Thanks for any pointers.