System Management Controller Reset
The System Management Controller is an integrated circuit (computer chip) that is on the logic board of the computer. As the name implies, it is responsible for power management of the computer. It controls backlighting, hard disk spin down, sleep and wake, some charging aspects, trackpad control, and some input/output as it relates to the computer sleeping.
Over time, the settings in the System Management Controller data may become corrupt, which can result in operational anomalies with the computer. Examples include not turning on, not waking from sleep, not charging the battery, or not recognizing the AC Adapter, among others.
- If the computer is on, turn it off.
- Disconnect the AC Adapter and remove the computer's battery.
- Press and hold the power button for 5 seconds and then release the button.
- Reconnect the battery and AC Adapter.
- Press the power button to restart the computer