Apple MacBook (13-inch, Aluminum, Late 2008) - Manual (Page 57)

Chapter 4 Problem, Meet Solution 57
To use Apple Hardware Test:
1 Disconnect all external devices from your computer except the power adapter.
If you have an Ethernet cable connected, disconnect it.
2 Restart your MacBook while holding down the D key.
3 When the Apple Hardware Test chooser screen appears, select the language you want
to use.
4 Press the Return key or click the right arrow button.
5 When the Apple Hardware Test main screen appears (after about 45 seconds), follow
the onscreen instructions.
6 If Apple Hardware Test detects a problem, it displays an error code. Make a note of the
error code before pursuing support options. If Apple Hardware Test doesn’t detect a
hardware failure, the problem may be software related.
If this procedure doesn’t work, you can insert the Applications Install DVD to use Apple
Hardware Test. For more information, see the Apple Hardware Test Read Me file on the
Applications Install DVD that came with your computer.
Problems with Your Internet Connection
Your MacBook has the Network Setup Assistant application to help walk you through
setting up an Internet connection. Open System Preferences and click Network.
Click the “Assist me” button to open Network Setup Assistant.
If you have trouble with your Internet connection, you can try the steps in this section
starting with Network Diagnostics.