Apple MC413LL/A manual If the iMac won’t turn on or start up

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To get support and contact information for the software that came with your iMac, go to www.apple.com/guide.

If the problem occurs frequently, you may need to reinstall your system software (see ÒReinstalling the Software That Came with Your iMacÓ on page 70).

If the iMac freezes during startup or you see a flashing question mark

åWait a few seconds. If your iMac doesnÕt start up after a brief wait, shut it down by pressing and holding the power (¨) button for about 5 seconds, until the iMac shuts down. Then hold down the Option key and press the power (¨) button again to start up your iMac. When your iMac starts up, click the hard disk icon, then click the right arrow.

åAfter the iMac starts up, open System Preferences and click Startup Disk. Select a local Mac OS X System folder.

åIf the problem occurs frequently, you may need to use Disk Utility (located on the Mac OS X Install Disc 1 that came with your iMac) or reinstall your system software (see ÒReinstalling the Software That Came with Your iMacÓ on page 70).

If the iMac won’t turn on or start up

åMake sure the power cord is plugged into the iMac and into a functioning power outlet.

åIf that doesnÕt work, press the power (¨) button and immediately hold down the Command (x), Option, P, and R keys until you hear the startup sound a second time.

åIf you recently installed additional memory, make sure that it is correctly installed and that it is compatible with your iMac. Check whether removing the memory you installed allows the iMac to start up (see page 60).

Chapter 5 Troubleshooting

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Contents User’s Guide Page Contents Installing Memory Index Page Getting Started What’s in the Box Setting up Your iMac Getting Started Connect the keyboard and mouse cables Getting Started If you would like more information, see the following More InformationPutting Your iMac to Sleep or Shutting It Down Put Your iMac to SleepShut Down Your iMac For the Latest Information Getting to Know Your iMacApple Remote Basic Features of Your iMacSlot-loading optical disc drive Power indicator lightBuilt-in speakers Remote restAdditional Features of Your iMac Built-in iSight camera Camera indicator lightBuilt-in microphone Built-in infrared IR receiverPorts on Your iMac Mini-DVI video out port Ethernet port 10/100/1000Base-T Two FireWire 400 portsAudio in/optical digital audio in port Headphone out/optical digital audio portAdditional Components of Your iMac Security slot Power button Power portMemory access AirPort Extreme wireless technology insideCustomizing Your Desktop and Setting Your Preferences Connecting a Printer To set up a printerMonitoring Printing Keeping Your Software Up to Date To check for updated softwareTransferring Files to Another Computer Page Using Your iMac Using Mighty Mouse To open Keyboard & Mouse preferences Configuring Mighty MouseMore Information About Mighty Mouse Keyboard ControlsKeyboard equivalent Apple Remote button Using the Apple Remote and Front Row To use your Apple Remote Your Apple Remote canTo pair your Apple Remote with your iMac Pairing Your Apple RemoteTo delete a pairing between the Apple Remote and your iMac Replacing the Apple Remote BatteryTurning Off IR Reception To turn off IR receptionMore Information About the Apple Remote To replace the batteryTaking Pictures with Photo Booth Using the Built-in iSight CameraUsing Your iSight Camera with iMovie HD To capture live videoVideoconferencing with iChat AV To start a videoconference Turning Off the iSight CameraHow AirPort Provides Wireless Internet Access Understanding AirPort Extreme Wireless NetworkingMore Information About AirPort More Information About Using Ethernet Connecting to an Ethernet NetworkHeadphone Out/Optical Digital Audio Out Port Using Audio DevicesAudio In/Optical Digital Audio In Port More Information About Using AudioConnecting an External Display, Projector, TV, or VCR Connecting External Displays, Televisions, and Video DevicesMore Information About Using an External Display or TV To connect an external display or projectorTo connect a TV or VCR to your iMac Using USB Devices Using High-Speed Universal Serial Bus USBMore Information About USB Using Multiple USB Devices at the Same TimeThese are some of the things you can do with FireWire Connecting FireWire DevicesMore Information About FireWire Using FireWire DevicesUsing Your Optical Drive To use a CD or DVD disc, follow these steps Inserting a CD or DVD DiscEjecting a Disc Playing DVD DiscsTo eject a disc, do one of the following To record music to a CD-R or CD-RW disc using iTunes Recording CD-R and CD-RW DiscsMore Information About Recording CDs Securing Your iMac Page Installing Memory Replacing the Memory To install memoryRemove the memory access door and set it aside Remove Memory modules Levers Push levers Memory modules Raise stand Making Sure Your iMac Recognizes the New Memory To check the memory installed in your iMacPage Troubleshooting5 If your iMac won’t respond or the pointer won’t move Problems That Prevent You from Using Your iMacIf the iMac won’t turn on or start up Reinstalling the Software That Came with Your iMac Installing Mac OSTo install Mac OS When an Application Doesn’t Respond Installing ApplicationsTo install applications To force an application to quitOther Problems If you have a problem with an applicationIf you have trouble using AirPort wireless communication If you have trouble ejecting a disc If you have a problem with your Internet connectionLocating Your Product Serial Number If your date and time settings get lost repeatedlyTo use Apple Hardware Test Using Apple Hardware TestPage Specifications Page Safety Instructions for Setting Up and Using Your iMac Safety, Use, and Care InformationAppendix B Safety, Use, and Care Information Do Not Make Repairs Yourself Connectors and PortsHigh-Risk Activities Warning Laser InformationUnderstanding Ergonomics Avoid Hearing DamageShoulders relaxed Mouse Cleaning Your iMac Display Cleaning Your iMacTo clean your iMac screen, do the following Carrying Your iMacThere are four kinds of Internet connections Connecting to the InternetTo find the settings on a Mac OS X computer To find the settings on a Windows PCBefore you can connect to the Internet, you need to Gathering the Information You Need Manually Using Dhcp with a manual address Using BootP PPP To use Network Assistant Using Network Setup Assistant to ConnectTo use Network Diagnostics Troubleshooting Your ConnectionTurn the modem on and off and reset the modem hardware Cable Modem, DSL, and LAN Internet ConnectionsPPPoE Connections Check System Preferences settingsNetwork Connections Compliance Statement Regulatory Compliance InformationExposure to Radio Frequency Energy Wireless Radio UseEuropean Community Europe-EU Declaration of ConformityApple and the Environment External USB Modem InformationDisposal and Recycling Information Battery Disposal InformationTaiwan European Union-Disposal Information Page 101 IndexEthernet cable 44 port 21 using 103 104 USB