Quite possible that your terminal program isn't actually sending F2 when you press F2.
If you're using something like PuTTY, make sure that under settings Terminal > Keyboard you set the function keys to Xterm R6. Other terminal applications may have similar settings. If that particular setting doesn't work, try another one, or try a different application to access the console.
You might also be able to plug in a USB keyboard and press F2 on that.