Chosen Solution

Need some help. Have successfully installed a replacement i/o board per the instructions on iFixit website.

  1. Good news is that battery now charges properly, and the sleep and restart commands function properly when accessed through the Apple icon.
  2. However, the power button does not function properly. Power button will not turn on machine. Also, when attempting to shut down machine using power button the usual menu of “sleep, restart, shut down, cancel”, does not appear — instead, the machine simply shuts down immediately.
  3. Once machine is off it can only be powered up by disconnecting battery and connecting charger. Machine will then power up on its own.
  4. Have tried resetting SMC and PRAM but with no success. Any ideas would be greatly appreciated.

Here’s how to replace your keyboard with power button: https://www.youtube.com/watch?v=Yt8xZIDt…