2.26 or 2.4 GHz / White plastic unibody enclosure

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Is my logic board safe?

I recently purchased a macbook off eBay, it was considerably cheap, because in the description it said the keyboard was very buggy and would type different letters other than the ones pressed. I am wondering if its most likely the logic board or the keyboard itself? keeping in mind that the track pad works perfectly and when an external keyboard is used it works perfectly.

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Your logic board should be fine. The keyboard in the upper case emulates a usb keyboard and goes through one of the usb channels. If the keys on it are functioning at all correct or incorrect key the logic board part is good. Use your external keyboard to reset your PRAM and erase the library files for the keyboard. If that does not solve your problem replace the upper case with the keyboard.

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