If turning on the MacBook immediately gives you the fan running at full power, but no screen or any other sign of life the logic board is likely fried. Using your device on a hard, flat surface like a table or desk is best for temperature control." The surface your device rests on can block its vents, affecting fan behavior. If you use your device on a soft surface like a couch, pillow, bed, or your lap, its fans might run more. MacBook Air computers have vents along the back near the clutch. MacBook Pro has vents along the side and on the back. ![]()
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