Why won't cisco 3825 start?

Question

Cisco

I tried to stop the password according to instructions on the Internet after I changed the register to 2142 and rebooted, the rocker does not rise through the console cable, the router is silent. What could be the problem? I am writing on the phone

Answer 1

The COM port settings have gone wrong or you are using the wrong COM port.
Check port settings. Try connecting with a console cable to another device.

Answer 2

I tried to stop the password according to instructions on the Internet after I changed the register to 2142

What exactly command did you use? Correct command confreg 0x2142If you entered, for example, confreg 2142, then this is not the value you need.

The router is silent on the console cable. What could be the problem?

If you entered the wrong value, most likely you have overwritten the console settings. If I were you, I would try to connect to the console, going through all the possible settings (baud rate, etc.).
If you entered confreg 2142 (decimal instead of hexadecimal), try setting the baud rate to 4800.