OS X Leopard keyboard is unresponsive! (The Sequel)

Alright, after I did a reboot on my computer the keyboard came back on, but there is still a problem. It stayed on for a few days, but then went unresponsive again! This is strange, and I am concerned about wether or not the system is just old, or is there a fix that can be preformed to it?

For those of you who did not see Part I of this problem, my Mac OSX Leopard laptop has been having problems, and the keyboard is completely disfunctional (no caps-lock light or anything!). I am concerned on what the problem is, and how to fix it! 🙂