Hi,
How to recover password in router board 450G.
Thanks,
Srinivas
Not possible. You have to reset configuration to defaults.
Use reset button/place to reset the router,
http://wiki.mikrotik.com/wiki/Manual:Password_reset
Look there is reset on the board,
http://routerboard.com/index.php?showProduct=51
Alternative option to use Netinstall without saving old configuration,
http://wiki.mikrotik.com/wiki/Netinstall
You need to start configuration from the beginning.