Apple MC812LL/A, MD096LL/A manual Checking for a Hardware Problem, To use Apple Hardware Test

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7To reinstall Mac OS X and your applications, follow the instructions in the Mac OS X Installer.

After reinstalling Mac OS X, you can re-download the Apple applications that came with your iMac and other apps you purchased from the Mac App Store. You can restore your other data and applications from a Time Machine or other backup.

Checking for a Hardware Problem

If you suspect a hardware problem, use the Apple Hardware Test application to help determine if there’s a problem with one of the iMac components.

To use Apple Hardware Test:

1Disconnect all external devices from your iMac, except the keyboard and mouse. If you have an Ethernet cable connected, disconnect it.

2Restart your iMac while holding down the D key.

3When the Apple Hardware Test chooser screen appears, select the language you want to use.

4Press the Return key or click the right arrow button.

5When the Apple Hardware Test main screen appears (after about 45 seconds), follow the onscreen instructions.

6If 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.

Chapter 4 Problem, Meet Solution

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Contents Congratulations, you and your iMac Were made for each other Welcome to your iMac OS X Lion Page Contents Looking for Something? Ready, Set Up, Go Ready, Set Up, Go What’s in the Box Setting Up Your iMac Ready, Set Up, Go Turn on your wireless keyboard and mouse Ready, Set Up, Go To set up your iMac Configure your iMacCustomize your desktop and set your preferences To wake your iMac from sleep, do one of the following Putting Your iMac to Sleep or Shutting It DownPutting Your iMac to Sleep To put your iMac to sleep, do one of the followingShutting Down Your iMac Page Life with Your iMac Basic Features of Your iMac Built-in ambient light sensor Ports on Your iMac Ethernet port 10/100/1000Base-T Other Components of Your iMac Power port Features of the Apple Wireless Keyboard and Magic Mouse Apple Wireless Keyboard About the Indicator Light Using the Apple Wireless KeyboardTo customize your keyboard Pairing Your Apple Wireless Keyboard with Your iMacUsing Your Apple Wireless Keyboard To pair your wireless keyboardUsing the Apple Magic Mouse Using Your Apple Magic Mouse Pairing Your Apple Magic Mouse with Your iMacTo pair your mouse To use your remote Using the Apple RemoteTo pair your remote Pairing Your Apple RemoteReplacing the Battery To replace the batteryMore Information Getting AnswersTo get help from Help Center System Preferences by choosing Apple K System Downloading Mac software Boost Your Memory Boost Your Memory To install memory Installing MemoryRemove the memory access door and set it aside Untuck the tabs Pull the tab Memory modules Raise stand Memory access door Phillips screwdriver Making Sure Your iMac Recognizes the New Memory To check the memory installed in your iMacProblem, Meet Solution Problem, Meet Solution An Ounce of Prevention Problems That Prevent You from Using Your iMacIf your iMac won’t respond or the pointer won’t move Problem, Meet Solution If you have trouble inserting a disc If your iMac won’t turn on or start upIf you have trouble scrolling with your mouse Repairing, Restoring, or Reinstalling Mac OS X SoftwareIf your date and time settings get lost repeatedly If you have trouble ejecting a discProblem, Meet Solution To connect by using a Wi-Fi network Repairing a Disk with Disk UtilityTo open the Mac OS X Utilities application Reinstalling Mac OS X and Apple Applications Restoring Information Using a Time Machine BackupRestoring Your Computer to Its Factory Settings To use Apple Hardware Test Checking for a Hardware ProblemReplacing the Batteries To replace the batteries in the Apple Wireless Keyboard To replace the batteries in the Apple Magic Mouse Problems with Your Internet ConnectionCable Modem, DSL Modem, and LAN Internet Connections To use Network DiagnosticsPPPoE Connections To enter PPPoE settingsProblems with Wireless Communication Keeping Your Software Up to Date Learning More, Service, and SupportOnline Resources Onscreen Help AppleCare Service and SupportSystem Information Country Phone Website Locating Your Product Serial NumberLast, but Not Least Important Safety Information Last, but Not Least Mouse Class 1 Laser Information Power specificationsDo Not Make Repairs Yourself Laser Information for Optical Disc DrivesÂÂ Maximum operating altitude 10,000 feet 3048 meters Important Handling InformationCleaning Your iMac Display Cleaning Your iMacTo clean your iMac display, do the following Mouse Cleaning Your MouseUnderstanding Ergonomics KeyboardDisplay Chair Apple and the EnvironmentRegulatory Compliance Information Bluetooth Europe-EU Declaration of Conformity Korea Warning Statements Japan Vcci Class B Statement Taiwan Battery Statement Chinese Battery Statement Page Looking for Something? Index Looking for Something? Parameter RAM, resetting 49 ports Force an application to quit Page Simultaneously published in the United States and Canada