Apple MD771LL/A manual Computer won’t turn on or start up

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åChoose Apple ( ) > Force Quit and select the application you want to quit.

You can also force quit by pressing the Esc, Option, and Command (x) keys at the

same time. Restart your Mac Pro by choosing Apple ( ) > Restart to be sure the problem is entirely cleared up. You can also restart by pressing the power (¨) button for about 5 or 6 seconds until your Mac Pro shuts down. Press the power (¨) button again to start up your Mac Pro.

åIf the problem occurs only when you use a particular program, check with the programÕs manufacturer to see if it is compatible with your computer.

åIf the problem occurs frequently, choose Help > Mac Help and search for Òproblems. Ò

The computer won’t turn on or start up.

åMake sure the power cord is connected to a working power source. The plug on the power cord must be completely inserted into the computerÕs power socket and firmly seated.

åIf your computer still does not start up, try resetting the parameter random access memory (PRAM). Turn on the computer and immediately hold down the Command (x), Option, P, and R keys until you hear the startup sound a second time. Release the keys. Set your hard disk as the computerÕs startup disk, by doing the following:

1Choose Apple ( ) > System Preferences.

2Click Startup Disk.

3Select your hard disk.

The PRAM is reset to the default values and your clock settings may need to be reset.

åIf your computer does not start up after resetting the PRAM, restart your computer while holding down the Option key to select your startup disk.

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Chapter 4 Troubleshooting

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Contents User’s Guide Page Contents Regulatory Compliance Information IndexSetting Up Your Mac Pro Getting StartedPosition your computer and display Plug in the power cord Connect the display Port Connect an Ethernet cable Connect the keyboard and mousePlug the mouse into a USB port on the keyboard KeyboardMouse Use Setup Assistant Need Help Setting Up?Using a Wireless Keyboard and Mouse Turn on your Mac ProPutting Your Mac Pro to Sleep or Shutting It Down Putting Your Mac Pro to SleepShutting Down Your Mac Pro To wake your computer from sleep, do one of the followingGetting to Know Your Mac Pro Getting the Latest InformationBasic 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 DrivesTo 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 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 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 slotReplacing the Internal Backup Battery To replace the batteryWorking Inside Your Computer Page Problems with Your Mac Pro Computer won’t respond or the pointer won’t moveComputer 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 screenAfter you change the screen resolution, desktop icons move Screen image appears dim or flickersScreen freezes Problems with Your Internet ConnectionTo use Network Diagnostics Light on the front of the display is flashingCable Modem, DSL, and LAN Internet Connections Turn the modem off and on to reset the modem hardwareCheck System Preferences settings PPPoE ConnectionsNetwork Connections Using Apple Hardware Test To use Apple Hardware TestInstalling Applications Reinstalling the Software That Came with Your ComputerInstalling Mac OS To install Mac OSMaximizing Ethernet Performance System Profiler Learning More, Service, and SupportOnline Resources Onscreen Help Apple Hardware TestAppleCare Service and Support Information Country Phone WebsiteLocating Your Serial Number Processor Processor and Memory SpecificationsRandom-access memory RAM AppendixVideo Display Modes SuperDrive DVD+R DL/DVD±RW/CD-RW SpecificationsGraphics Card Data formatsUSB Specifications FireWire SpecificationsEthernet Specifications Bluetooth 2.0+EDR Specifications OptionalPower Compatibility AirPort Extreme Specifications OptionalOptical Digital Audio Specifications Optical digital audio outAnalog Audio Specifications Analog audio out using the headphone jack typical valuesAnalog audio line in typical values Power Supply Power Requirements for Expansion Cards and PeripheralsBattery System Clock and BatteryDimensions and Operating Environment DimensionsSafety, Maintenance, and Ergonomics General Maintenance Apple and the EnvironmentTo keep your optical drive working properly Protecting Your Optical DriveMaintaining Your Display 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