Remove the bottom service cover and pull out the main laptop battery.
Turn on the laptop and enter a wrong password three times consecutively.
Accessible by pressing F1 or F10 during startup to bring up the System Information screen. The Process
Note: If the code starts with 'A', ignore the 'A' and use the 8-digit number following it. Alternative site: If one site fails, try biospark.com JustAnswer Method 2: SMC.bin File Method (Official/Advanced)