Problems with Your Internet Connection | Apple MD771LL/A manual

The screen freezes.

å Force the frozen application to quit. Choose Apple ( ) > Force Quit and select the application.

åIf that doesnÕt work, force the computer to restart by pressing the power button (¨) for 5 or 6 seconds until your Mac Pro shuts down. Press the power button (¨) again to start up your Mac Pro.

The light on the front of the display is flashing.

On some Apple flat panel displays, the power light displays a series of short flashes when an error is detected.

åIf you see a repeating sequence of three short flashes, the display is detecting input in the wrong video format. Make sure your display is compatible with your graphics card and that youÕve installed the correct display software, if your display came with installation software.

åIf you see a sequence of two short flashes and a long flash, the display is detecting a problem with a backlighting lamp. Contact an Apple Authorized Reseller or Apple Authorized Service Provider.

Problems with Your Internet Connection

If you have trouble with your Internet connection, you can try the steps in this section starting with Network Diagnostics.

To use Network Diagnostics:

1Choose Apple ( ) > System Preferences.

2Click Network and then click ÒAssist me.Ó

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Chapter 4 Troubleshooting

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Apple MD771LL/A Problems with Your Internet Connection, Screen freezes, Light on the front of the display is flashing

Contents

User’s Guide Page Contents Regulatory Compliance Information Index Setting Up Your Mac Pro Getting Started Position your computer and display Plug in the power cord Connect the display Port Connect an Ethernet cable Connect the keyboard and mouse Plug the mouse into a USB port on the keyboard KeyboardMouse Need Help Setting Up? Using a Wireless Keyboard and MouseUse Setup Assistant Turn on your Mac Pro Putting Your Mac Pro to Sleep or Shutting It Down Putting Your Mac Pro to Sleep Shutting Down Your Mac Pro To wake your computer from sleep, do one of the following Getting to Know Your Mac Pro Getting the Latest Information Basic Features on the Front of Your Mac Pro FireWire 400 and 800 ports Ports and Connectors on the Back of Your Mac Pro Power socket More Ports and Connectors on the Back PCI Express expansion slots Internal Expansion Options Optical drives Getting Answers More InformationTo open Mac Help Open System Preferences by choosing Apple S ystem Page Working Inside Your Computer Opening the Computer Unplug all the cables and the power cord from the computer Lift the latch while holding the side panel Remove the side panel Installing Memory To install memory Top memory card Working Inside Your Computer Place the side panel in the slot and then push to close Push the latch down to secure the side panel Installing Internal Storage Devices Installing Sata 3 Gbit/s Hard Disk Drives To install a hard disk drive Position the connectors towards the rear Replace the side panel and push the latch down to secure it Replacing the Optical Drive To replace the optical drive Working Inside Your Computer Four extra screws Power cable middle connector Ribbon cable end connector Replace the side panel and push the latch down to secure it To install a PCI Express card Adding PCI Express CardsAbout PCI Express Cards Port access cover Did You Know?-Installing a Full-Length PCI Card Port access opening PCI Express slot Replacing the Internal Backup Battery To replace the battery Working Inside Your Computer Page Problems with Your Mac Pro Computer won’t respond or the pointer won’t move Computer won’t turn on or start up You are unable to eject a disc If that doesn’t workStatus light flashes and the computer won’t start up Problems with Software You have a problem with a software programTo force an application to quit Problems with AirPort Wireless Communication To check for updated softwareKeeping Your Software Up to Date Problems with Your Display No image appears on the screen After you change the screen resolution, desktop icons move Screen image appears dim or flickers Problems with Your Internet Connection To use Network DiagnosticsScreen freezes Light on the front of the display is flashing Turn the modem off and on to reset the modem hardware Check System Preferences settingsCable Modem, DSL, and LAN Internet Connections PPPoE Connections Network Connections Using Apple Hardware Test To use Apple Hardware Test Reinstalling the Software That Came with Your Computer Installing Mac OSInstalling Applications To install Mac OS Maximizing Ethernet Performance Learning More, Service, and Support Online Resources Onscreen HelpSystem Profiler Apple Hardware Test AppleCare Service and Support Information Country Phone Website Locating Your Serial Number Processor and Memory Specifications Random-access memory RAMProcessor Appendix SuperDrive DVD+R DL/DVD±RW/CD-RW Specifications Graphics CardVideo Display Modes Data formats USB Specifications FireWire Specifications Ethernet Specifications Bluetooth 2.0+EDR Specifications OptionalPower AirPort Extreme Specifications Optional Optical Digital Audio SpecificationsCompatibility Optical digital audio out Analog Audio Specifications Analog audio out using the headphone jack typical valuesAnalog audio line in typical values Power Supply Power Requirements for Expansion Cards and Peripherals System Clock and Battery Dimensions and Operating EnvironmentBattery Dimensions Safety, Maintenance, and Ergonomics General Maintenance Apple and the Environment Protecting Your Optical Drive Maintaining Your DisplayTo keep your optical drive working properly To maintain your display and ensure its long life Important Ergonomic and Health-Related Information Forearms and hands in a straight line Avoid Hearing Damage Compliance Statement Wireless Radio Use Korea Mouse Statement Apple and the Environment Disposal and Recycling Information Taiwan European Union-Disposal Information Page Index Index