KB2003010101 - How to run basic hardware diagnostic on Mac
Instructions
Step-by-step guide:
Restart the machine either from Mac or Windows
Press the letter “d” and hold until the Apple logo followed by the language option comes up
Select the English option
The message showed up: “Checking your MAC”
When it finishes, it will show if there is no issue: No issues found. ADP000
If there is an issue, it will say something else.
Press the Restart button
Press the option key and hold until the Apple logo followed by the boot option i.e. Windows or Macintosh HD