Touchpad and keyboard dosen't work

Hi,
am using a MacBook4,1
it was working properly until i pluged into a non Apple keyboard to my MacBook.
After i pluged in an error has been occurred like press the key rapidly just after the right button.
but there was not such kind of button in my USB keyboard.
whatever,an external USB keyboard works fine.
after some time later,i discovered that my built in touchpad and keyboard stop working.
now i dont know how to fix it up. even am writing it using an external keyboard.
is there anyone who can rescue me up from that **** good condition??
if anybody know how to fix the problem,please help me out from this **** good problem.
My MacBook Config is-
Model Name: MacBook
Model Identifier: MacBook4,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
L2 Cache: 3 MB
Bus Speed 800 MHz
Boot ROM Version: MB41.00C1.B00.
SMC Version (System):1.31f1
Serial Number (System): W8******0P2
Operating System: Mac OS X 10.5.8 (Leopard)
<Edited by Host>

Hello there, omsmac.
The following Knowledge Base article provides a great place to start with some good information that can apply to keyboard issues as well as trackpad:
Trackpad or Magic Trackpad is jumpy or erratic
http://support.apple.com/kb/TS1449
Aside from the usage recommendations, this recommended step is very practical:
If none of the above resolve the issue, try to rule-out software not created by Apple as a cause. To do so, start in Safe Mode.
There are some good steps for testing the keyboard as well found here:
One or more keys on the keyboard do not respond
http://support.apple.com/kb/TS1381
If the issue persists after attempting Safe Mode, then you may want to try an SMC (System Management Controller) reset. The steps on how to accomplish that are found here:
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ht3964
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

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