How to Test a Logic Board (5 Steps)

Get the Install Disc 1 DVD that came with your computer and load it into the drive.
Restart your Mac in either of these two ways: by selecting 'Restart' in the main Apple menu or by pressing 'Command-Control-Eject' at the same time on your keyboard.
Immediately press the 'Option' key and hold it down. The Startup Manager will open. Release the 'Option' key.
Wait until the watch that shows the progress of the action disappears, then select 'Apple Hardware Test volume.'
That's all there is to it. The utility will indicate whether there is a problem with the logic board.
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