MacBook Not Turning On — Step-by-Step Fix
First: Distinguish No Power from No Display
Listen for fan noise when you press the power button. If fans spin but the screen is black, it is a display issue. If nothing happens at all — no fan, no sound — it is a power issue.
Fix 1: Charge for 30 Minutes First
A completely discharged MacBook will not power on immediately when plugged in. Leave it on charge for 30 minutes with no attempt to power on, then try again.
Fix 2: Try a Different Charger and Cable
MagSafe and USB-C cables can fail invisibly. A faulty cable is responsible for a significant percentage of “won’t turn on” reports.
Fix 3: Reset SMC (Intel MacBooks)
Shut down → Hold Shift + Control + Option + Power for 10 seconds → Release → Press Power to boot. The SMC handles power, charging, and thermal management.
Fix 4: Reset NVRAM/PRAM
Power on → immediately hold Option + Command + P + R for ~20 seconds until you hear the startup chime twice. NVRAM stores settings that can cause display failures on boot.
Fix 5: Run Apple Diagnostics
Hold D while powering on (or Option + D for internet diagnostics). This identifies hardware failures. A logic board or battery issue means a Genius Bar appointment.
