The boot loader can also be used to manage the switch if the IOS cannot be loaded.
The boot loader can be accessed through a console connection by:
Connecting a PC by console cable to the switch console port. Unplug the switch power cord.
Reconnecting the power cord to the switch and press and hold the Mode button.
The System LED turns briefly amber and then solid green. Release the Mode button.
The boot loader switch:prompt appears in the terminal emulation software on the PC.