Apple MD771LL/A manual Cable Modem, DSL, and LAN Internet Connections, PPPoE Connections

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3Click Diagnostics to open Network Diagnostics.

4Follow the onscreen instructions.

If Network Diagnostics canÕt resolve the problem, there may be a problem with the Internet service provider (ISP) you are trying to connect to, with an external device you are using to connect to your ISP, or with the server you are trying to access. You can also try the steps in the following section.

Cable Modem, DSL, and LAN Internet Connections

Make sure all modem cables are fully plugged in, including the modem power cord, the cable from the modem to the computer, and the cable from the modem to the wall jack. Check the cables and power supplies for Ethernet hubs and routers.

Turn the modem off and on to reset the modem hardware.

Turn off your DSL or cable modem for a few minutes, and then turn it back on. Some ISPs recommend that you unplug the modemÕs power cord. If your modem has a reset button, you can press it either before or after you turn the power off and on.

PPPoE Connections

If you are unable to connect to your Internet service provider using PPPoE, make sure you have entered the correct information in Network preferences.

Check System Preferences settings:

1Choose Apple ( ) > System Preferences.

2Click Network.

3Choose Network Port Configurations from the Show pop-up menu.

4Drag Built-in Ethernet to the top of the Port Configurations list.

5Choose Built-in Ethernet from the Show pop-up menu.

Chapter 4 Troubleshooting

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Contents User’s Guide Page Contents Index Regulatory Compliance InformationGetting Started Setting Up Your Mac ProPosition your computer and display Plug in the power cord Connect the display Port Connect the keyboard and mouse Connect an Ethernet cablePlug the mouse into a USB port on the keyboard KeyboardMouse Using a Wireless Keyboard and Mouse Need Help Setting Up?Use Setup Assistant Turn on your Mac ProPutting Your Mac Pro to Sleep Putting Your Mac Pro to Sleep or Shutting It DownTo wake your computer from sleep, do one of the following Shutting Down Your Mac ProGetting the Latest Information Getting to Know Your Mac ProBasic 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 More Information Getting AnswersTo 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 Sata 3 Gbit/s Hard Disk Drives Installing Internal Storage DevicesTo install a hard disk drive Position the connectors towards the rear Replace the side panel and push the latch down to secure it To replace the optical drive Replacing the Optical DriveWorking 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 Adding PCI Express Cards To install a PCI Express cardAbout PCI Express Cards Port access cover Port access opening PCI Express slot Did You Know?-Installing a Full-Length PCI CardTo replace the battery Replacing the Internal Backup BatteryWorking Inside Your Computer Page Computer won’t respond or the pointer won’t move Problems with Your Mac ProComputer won’t turn on or start up If that doesn’t work You are unable to eject a discStatus light flashes and the computer won’t start up You have a problem with a software program Problems with SoftwareTo force an application to quit To check for updated software Problems with AirPort Wireless CommunicationKeeping Your Software Up to Date No image appears on the screen Problems with Your DisplayScreen image appears dim or flickers After you change the screen resolution, desktop icons moveTo use Network Diagnostics Problems with Your Internet ConnectionScreen freezes Light on the front of the display is flashingCheck System Preferences settings Turn the modem off and on to reset the modem hardwareCable Modem, DSL, and LAN Internet Connections PPPoE ConnectionsNetwork Connections To use Apple Hardware Test Using Apple Hardware TestInstalling Mac OS Reinstalling the Software That Came with Your ComputerInstalling Applications To install Mac OSMaximizing Ethernet Performance Online Resources Onscreen Help Learning More, Service, and SupportSystem Profiler Apple Hardware TestCountry Phone Website AppleCare Service and Support InformationLocating Your Serial Number Random-access memory RAM Processor and Memory SpecificationsProcessor AppendixGraphics Card SuperDrive DVD+R DL/DVD±RW/CD-RW SpecificationsVideo Display Modes Data formatsFireWire Specifications USB SpecificationsBluetooth 2.0+EDR Specifications Optional Ethernet SpecificationsPower Optical Digital Audio Specifications AirPort Extreme Specifications OptionalCompatibility Optical digital audio outAnalog audio out using the headphone jack typical values Analog Audio SpecificationsAnalog audio line in typical values Power Requirements for Expansion Cards and Peripherals Power SupplyDimensions and Operating Environment System Clock and BatteryBattery DimensionsSafety, Maintenance, and Ergonomics Apple and the Environment General MaintenanceMaintaining Your Display Protecting Your Optical DriveTo keep your optical drive working properly To maintain your display and ensure its long lifeImportant 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