Apple 2009 MacBook Specifications download pdf (Page 45)

Chapter 4 Problem, Meet Solution 45

Â Check whether the battery needs to be recharged. Press the small button on the

battery. You should see one to four lights indicating the battery’s level of charge. If a

single indicator light is flashing, allow the power adapter to charge the battery at

least until that indicator light is glowing continuously.

Â If the problem persists, reset the MacBook power manager by disconnecting the

power adapter, removing the battery, and holding down the power (®) button for at

least 5 seconds.

Â If you recently installed additional memory, make sure that it is correctly installed and

that it is compatible with your computer. See whether removing it and reinstalling

the old memory allows the computer to start up (see page 35).

Â Press 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).

Â If you still can’t start up your MacBook, see “Learning More, Service, and Support” on

page 53 for information about contacting Apple for service.

If the screen suddenly goes black or your MacBook freezes

Try restarting your MacBook.

1 Unplug any devices that are connected to your MacBook, except the power adapter.

2 Press the power (®) button to restart the system.

3 Let the battery charge to at least 10 percent before plugging in any external devices

and resuming your work.

To see how much the battery has charged, look at the Battery ( ) status icon in the

menu bar.

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Apple 2009 MacBook Specifications Page 45