User's Guide

42
Chapter 3 Problem, Meet Solution
If your MacBook Air doesn’t turn on or start up
Try the following suggestions in order until your computer turns on:
 Make sure the power adapter is plugged into the computer and into a functioning
poweroutlet.Besuretousethe45WMagSafePowerAdapterthatcamewithyour
MacBook Air. If the power adapter stops charging and you don’t see the indicator
light on the power adapter turn on when you plug in the power cord, try unplugging
and replugging the power cord to reseat it.
 Check whether the battery needs to be recharged. If the light on the power adapter
glowsamber,thebatteryischarging.See“ChargingtheBattery”onpage34.
 If the problem persists, reset the MacBook Air power manager (while still preserving
yourles)bypressingtheleftShiftkey,leftOption(alt)key,leftControlkey,andthe
power (®)buttonsimultaneouslyforvesecondsuntilthecomputerrestarts.
 Press and release the power (®) button and immediately hold down the Command
(x), Option, P, and R keys simultaneously until you hear the startup sound a second
time. This resets the parameter RAM (PRAM).
 If you still can’t start up your MacBook Air, see “Learning More, Service, and Support”
onpage47forinformationaboutcontactingAppleforservice.