My Problem

Daughter got too enthusiastic cleaning the keyboard, and can only assume the window cleaner must have carried dirt into the contacts. Columns of keys stopped working.

Battery had died of old age: no longer registered with the diagnostic subsystem.

My Fix

Followed the instructions and it all came together as described. Keyboard and battery working 100% again.

My Advice

Lay the screws and fixings out in the order in which you take them out (according to the directions). Makes it easier to locate everything in the reassembly.

My Problem

When idle, the macbook would prompt with a shutdown dialog (are you sure you want to shutdown?). This occurred every 70 seconds. Sometime it would also display the dashboard (like F12 had been pressed).

My Fix

The problem was the upper case (keyboard, power button, trackpad). It was easy to replace with the ifixit guides and it fixed the problem.

My Advice

macs are expensive to replace with a new one and definitely worth repairing if it's cost effective and the mac still meets your needs.