confreg 0x2142 is not bypassing startup configuration on 4351ISR

[KBMTech]

So I have had a few 4351ISR units that will not enter password recovery mode. My steps are below:

1. Power on the router
2. Press CTRL-C until it enters ROMMON
3. At ROMMON1> confreg 0x2142
4. at ROMMON2> reset

The router reboots and asks for user name and password. I then try the following:

1. Power on the router
2. Press CTRL-C until it enters ROMMON
3. At ROMMON1> confreg 0x0
4. At ROMMON2> reset
5. Unit reboots to ROMMON1>
6. At ROMMON1>confreg 0x2142
7. At ROMMON2>reset

Unit reboots and asks for User Name and Password again.

I then entered ROMMON again as I did above and tried the following:

ROMMON1>b usb0: isr4300-universalk9.17.09.04.SPA

Still asks for username and password. 

I am just a bit frustrated now. Does anyone have a solution for this? Other than an hammer, of course.

[marce1000]

 - Checkout this procedure instead : https://www.cisco.com/c/en/us/td/docs/routers/access/4400/troubleshooting/guide/isr4400trbl/isr4400trbl02.html
           (it is different from what you are currently doing)

 M.

[KBMTech]

I am sorry, this did not work. 

[devrogers]

Please try this link:

https://community.cisco.com/t5/networking-knowledge-base/password-recovery/ta-p/3123097

[Leo Laohoo]

If the router is in ROMMON, post the complete output to the command "set".