Keyboard and trackpad aren't working-pulled from a differnet mac
I just installed an upper case from a different MacBook to my current one, but neither the keyboard nor the trackpad work. I'm pretty sure the keyboard and trackpad worked fine on the MacBook it was previously on, but only the power button works when it is installed on the different MacBook. The upper case should be the same for both Macbooks (both the Core 2 Duo). I thought it could be a software issue, but the keys don't work even when I first turn the MacBook on (so I've been unable to reset the PRAM.) I tried an external mouse and it does work. I checked the internal cable and connection and they seem to be fine. Any ideas? Thanks a lot.
Is this a good question?