HP Series 200 - To Clear the Manager and User Passwords

To Clear the Manager and User Passwords
Use a non-conducting, pointed implement such as a wooden pencil or a
toothpick to press and release the recessed Clear button. (Refer to
figure 2-9 on page 2-14.)
Access to the router will no longer be limited by a password. The Clear
button removes all constraints on access by anyone using the console,
Telnet, TFTP, or a network manager.
To set a new password, use the Network Control Language (NCL)
Password command on the console. For information on setting
passwords, refer to “Set Manager and User Passwords” (page 1-34).
Router Operation
Resetting the Router, Clearing the Passwords, and Clearing the Router
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