Mac Desktops First Steps
Always perform the following steps before starting a repair:
If replacing the logic board, turn off Find My Mac. Choose Apple Menu > System Settings > Apple Account. Select iCloud in the sidebar. Then deselect the Find My Mac checkbox. If you’re unable to access the Apple menu, continue performing the following steps.
If you were unable to turn off Find My Mac from the Apple menu, go to iCloud.com/find on a different device. Select All Devices. Select the device you want to remove. Then select Remove from Account.
Unplug the power cord from both the electrical outlet and the back of the device. Keep the power cord unplugged while the device is being repaired.
Disconnect all other cables from the device.
Clear and clean your workspace.
Put on an ESD wrist strap and attach it to a properly grounded ESD mat.
Caution
ESD (electrostatic discharge, or the release of static electricity) can damage electronic components.
Be aware of the following while performing a repair:
The manual for this model may show images of other models, but the procedures are the same. Ensure that you use the correct tools for the model you’re repairing.
Take your time. Thoroughly read all instructions and alerts.
Magnetizing the screwdrivers will make it easier to work with small screws.
Use only Kapton tape to secure cables and keep them out of the way when removing and reinstalling parts.
The end of each flex cable must align with its connector. Press the end of each flex cable to its connector until it clicks to ensure that it’s secure.