Apple MacBook Pro (Early 2008) - Manual (Page 50)

50 Chapter 4 Problem, Meet Solution
If the display suddenly goes black or your MacBook Pro freezes
Try restarting your MacBook Pro.
1 Unplug any devices that are connected to your MacBook Pro, 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, click the Battery ( ) status icon in the
menu bar.
The display might also darken if you have energy saver features set for the battery.
If you forgot your password
You can reset your administrator password and passwords for all other accounts.
1 Insert the Mac OS X Install Disc 1. Then restart your computer and hold down the C key
as it starts up.
2 Choose Utilities > Reset Password from the menu bar and follow the onscreen
instructions.
If you have trouble ejecting a disc
 Quit any applications that might be using the disc and try again. If that doesn’t work,
restart the computer and then immediately press and hold the trackpad button.