If you have two routers and it does not work on either one then it does sound suspicious that the cable or connectors may be faulty.
It may also be that the console port on the 2520 has been set to a different speed. The 2520 console supports 4 speeds: 1200, 2400, 4800, and 9600 (with 9600 being the default). It might help to configure Hyperterm to each of the speeds, stop Hyperterm, start Hyperterm again (many versions of Hyperterm do not recognize the change in speed till it stops and starts again) and see if you get anything.
Another thing to be aware of is whether you see output messages while the router is booting. If you see readable messages then you know that you have the correct speed. If the console still does not work then there is some other issue.
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 customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...