Cisco console port not responding

Platform: - Cisco IOS on switches and routers, console not responding to keyboard strokes
Keywords: - : console port not responding
Author: - Dinesh Aggarwal

The Problem:-

I won't be able to configure my router through console as it won't respond to the keyboard strokes.  I can see all the messages in hyperterminal while it boots up, but won't be able to type anything.

The Solution:-

Solution 1:-

Try unplugging the cables that go the router interfaces and see if that
helps... Recently we had a problem with a bad NIC on one of the PC's which was sending a lot of error packets... No console activity, but as soon as we unplugged the fast Ethernet cable, we were able to logon to the router and on checking the interface, found input errors in the range of millions. Check that out, and if the router is modular, try removing the modules one by one.

Solution 2:-

The solution 1 doesn’t solve the problem. The problem was rather simple. It was found that NUM lock keystroke of the keyboard was on. Just make that key off and it solved the problem. Sometimes the solution is much simpler.

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