My mac's keyboard and trackpad not working at all
I recently purchased a used macbook pro running OSx Lion 10.7, and i found out that the keyboard and trackpad are not working at all.
Connecting external KB and mouse works well and i was wondering what could possibly be the issue as i was advised by a friend to change the upper case with the KB and trackpad. I am looking forward to get it repaired without spending too much on the same.
Any advices appreciated.
Thanks, Ibrahim