Mac Basic Startup Troubleshooting Steps
Mac Startup TriageBlack Screen / No Backlight?Check the power source, power cable, etc.No power? Recycle the Mac’s power switch. (see step 1). Reset power breaker/GFI; replace power cable or brick.Power available? For Intel-based Macs, try resetting the SMC. (see step 4) No luck? Chances are it could be the Mac’s power supply, logic board, or…
