Macbook pro 15 silver keyboard. Top case was working fine, I swapped the hard drive, plugged the keyboard back on the logic board. Power up the macbook, no light on the keyboard, mouse pad not working, and keys are not working. I swapped the another Top case, and it works fine with my Macbook. Tried my Top case on another Macbook Pro, not working.
Should I try swapping the ribbon cable? Or is there a logical method to try? Is there something I should look for on the top case?