password recovery of the Cisco SG200-SG500

Reboot the switch. You will see a prompt during boot right after the cisco logo made out of #s that says

"Autoboot in 2 seconds - press RETURN or Esc. to abort and enter prom." 

 

Hit return, and you will get the following startup menu:

 

    Startup Menu

 

SG200-26 password reset  Download Software

SG200-26 password reset  Erase Flash File

SG200-26 password reset  Password Recovery Procedure

SG200-26 password reset  Set Terminal Baud-Rate

SG200-26 password reset  Stack menu

SG200-26 password reset  Back

Enter your choice or press 'ESC' to exit:

 

You'll want  SG200-26 password reset  Password Recovery Procedure  and follow the prompts to reset the password without erasing your config file.