If the screen image appears dim or flickers | Apple MD770LL/A

ÂÂ Make sure the display brightness and contrast are set properly. Use the brightness keys on the Apple Keyboard. Some displays have brightness and contrast controls on or under their front edge or on the side.

ÂÂ Reset the PRAM by restarting the computer while holding down the Command (x), Option, P, and R keys until you hear the startup sound a second time.

If the screen image appears dim or flickers

ÂÂ Adjust the display brightness and contrast settings. Use the brightness keys on the Apple Keyboard. Some displays also have brightness and contrast controls on or under their front edge. Or you may be able to adjust brightness or contrast using the Displays pane of System Preferences.

ÂÂ Calibrate the display by choosing Apple () > System Preferences. Click Displays, select Color, and click Calibrate. For more information about color and your display, see Help Center.

ÂÂ The flickering may be caused by interference from a nearby power line, a fluorescent light, or an electrical device—for example, a radio, a microwave oven, or another computer. Try relocating nearby electrical devices or moving your computer

and display.

If no colors appear on the screen or the colors don’t look right

ÂÂ Make sure the display is connected firmly to the computer.

ÂÂ Calibrate the display, as described in “If the screen image appears dim or flickers” on page 94.

If desktop icons move when you change the screen resolution

Changing the screen resolution affects the display of information on your screen. The operating system may reposition icons when you change the screen resolution.

94Chapter 4 Problem, Meet Solution

Image 94

Apple MD770LL/A If the screen image appears dim or flickers, If desktop icons move when you change the screen resolution

Contents

Page Welcome to your Mac Pro OS X Lion Page Contents What’s Under the Hood Looking for Something? Page Ready, Set Up, Go Ready, Set Up, Go Setting Up Your Mac Pro Position your Mac Pro and display Plug in the power cord Connect the display Mini DisplayPort Connect an Ethernet cable or join a Wi-Fi network Connect the USB cable from your keyboard Turn on your Apple Magic Mouse Turn on your Mac Pro To set up your Mac Pro Need Help Setting Up? Customize Your Desktop and Set Your Preferences Putting Your Mac Pro to Sleep or Shutting It Down Putting Your Mac Pro to Sleep To wake your Mac Pro from sleep, do one of the following Shutting Down Your Mac ProTo turn off your Mac Pro, do one of the following Life with Your Mac Pro Basic Features on the Front of Your Mac Pro Optical drive Power buttonTwo FireWire 800 ports Two USB 2.0 ports Features of Your Apple Keyboard Brightness keys F1, F2 Volume keys F11, F12Escape key esc Mission Control key F3 Ports and Connectors on the Back of Your Mac Pro Three USB 2.0 ports Power socket¥ Locking latch Two Gigabit Ethernet ports with jumbo frame support More Ports and Connectors on the Back Analog audio line-in port PCI Express expansion slotsAnalog audio line-out port Internal Expansion Options Hard disk drives or solid state drives BatteryOptical drives PCI Express slots More Information Getting AnswersTo open Help Center Using iLife applications Page Making a Good Thing Better ÂÂ Replacing the Internal Backup Battery on Opening Your Mac Pro Touch the metal case to discharge static Making a Good Thing Better Making a Good Thing Better Installing Memory ÂÂ Error-correcting code ECC One processor Installing Memory in a Quad-Core or 6-Core Mac Pro To install memory Latches Making a Good Thing Better Processor tray If you have Connectors Notch Ejectors Processor tray Latch Place the side panel in the slot and then push to close Making a Good Thing Better Installing Memory in an 8‑Core or 12‑Core Mac Pro To install memory in a dual-processor Mac Pro Latches Making a Good Thing Better Processor tray Fill these slots Connectors Notch Ejectors Processor tray Latch Installing Internal Storage Devices Installing Serial ATA Hard Disk Drives To install a hard disk drive Connectors Drive connectors Installing a Solid State Drive To install a solid state drive Unused screws Drive connectors Replacing an Optical Drive To replace the optical drive Pull the carrier halfway out of the optical drive bay Making a Good Thing Better Making a Good Thing Better Cable middle connector Cable end connector Making a Good Thing Better Adding PCI Express Cards About PCI Express Cards To install a PCI Express card If You’re Installing a Full-Length PCI Card PCI slider Hook on card Retention bar Brace PCI bracket Replacing the Internal Backup Battery Making a Good Thing Better Problem, Meet Solution An Ounce of Prevention Problems with Your Mac Pro If the computer doesn’t respond or the pointer doesn’t move If the computer doesn’t turn on or start up If you’re unable to eject a disc Problems with Software To force an application to quit Repairing, Restoring, or Reinstalling Mac OS X Software If you have a problem with a software program Problem, Meet Solution To connect via a Wi-Fi network Repairing a Disk with Disk UtilityTo open the Mac OS X Utilities application Restoring Information Using a Time Machine Backup Reinstalling Mac OS X and Apple Applications Restoring Your Computer to Its Factory Settings To install optional software, click Customize Click Install Checking for a Hardware Problem To use Apple Hardware Test To check for updated software Problems with Wi-Fi CommunicationKeeping Your Software Up to Date Problems with Your Display If no image appears on the screen If desktop icons move when you change the screen resolution If the screen image appears dim or flickers If the screen freezes Problems with Your Internet ConnectionTo use Network Diagnostics If your display has a light on the front and it’s flashing To enter PPPoE settings Cable Modem, DSL, and LAN Internet Connections Network Connections Replacing the Apple Magic Mouse Batteries To replace the batteries in the Apple Magic Mouse Learning More, Service, and Support Maximizing Ethernet Performance System Information AppleCare Service and SupportOnline Resources Onscreen Help Apple Hardware Test Country Phone Website 101 Locating Your Serial Number What’s Under the Hood Quad-core Mac Pro SpecificationsProcessor and Memory Specifications Core Mac Pro Graphics Card Random-access memory RAM105 Storage Video Display ModesPCI Express Expansion SuperDrive DVD±R DL/DVD±RW/CD-RW Specifications 107 FireWire Specifications USB SpecificationsPower Compatibility AirPort Extreme SpecificationsOptical Digital Audio Specifications Optical digital audio out Analog audio out using the headphone jack typical values Analog Audio SpecificationsOptical digital audio Analog audio line out typical values Analog audio line in typical values111 Power Requirements for Expansion Cards and Peripherals Power SupplySystem Clock and Battery Operating environment Dimensions and Operating EnvironmentDimensions 113Page Last, but Not Least Important Safety Information Always take the following precautions General Maintenance 117 Laser Information for Optical Disc Drive Protecting Your Optical DriveTo keep your optical drive working properly To maintain your display and ensure its long life Apple Magic Mouse Class 1 Laser InformationMaintaining Your Display 119 Mouse Understanding ErgonomicsKeyboard Chair Display 121 Apple and the Environment Avoid Hearing Damage Regulatory Compliance Information 123 124 Canadian Compliance Statement 125 126 Russia External USB Modem Information Battery Disposal Information 127Page Looking for Something? Index F1 to F19 function keys 27 Finder 131 PCI Express cards 31, 33 installing 74 specifications 133 Page Simultaneously published in the United States and Canada