Keyboard and Mouse Freeze On Login Screen

Hey there,
after just turning on my macbook pro 10.5.6 i am not able to use the keyboard nor the mouse to login, they are like froze, however the system is not. the writing cursor blinks in the password field, and the only button that works is the power button which i can press but cant use the keyboard to navigate, so i have to force shutdown. i can use keyboard to get into safe mode, where the same issue is found. and when i boot into single user mode, i am not able to use the keyboard. i also have tried attaching external keyboard and mouse, also no luck. However when i boot from the mac recovery discs, i am able to use both keyboard and mouse. Please if anyone can help me, i dont want to lose my information due to a restore. Thank You So Much Merry Christmas And Happy New Year!

lol sorry about that.
ok here is what i tried:
1) using the recovery disks to repair disk and permissions.
2) remove battery, press power button for 5 seconds and returning battery (weird, i read it on google)
3) long press power button
4) resetting the pram
5) tried attaching external keyboard and mouse
6) tried to enter single user mode however keyboard does not work in it to try some commands, also tried external keyboard, same result

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