Loss of the mouse after using failsafe is pretty typical. Loss of the keyboard is not, I'm guessing that you may be using a USB keyboard rather than the more typical ps2 style keyboard. I don't know what code will resolve things for you. I suggest reading through the cheat codes text file that comes down with a BitTorrent download or should be on the mirrors. There is a also a write-up on cheat codes in the wiki that is worth looking at. You might also want to try booting in expert mode and making notes about how you answer each question, if you hit a problem try again and vary your last answer. I can't off much more than that, you know at this point that Knoppix can run on your system and that the display will work, it's just a matter of finding a working configuration. And if you are using a USB keyboard and have an old PS2 style available, you might want to connect that temporarily while you try to work things out, it will make life a little easier until you work out your USB issue.