Apple LC 580 manual Musculoskeletal discomfort

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Musculoskeletal discomfort

As with any activity that involves sitting for long periods of time, using a computer can make your muscles sore and stiff. To minimize these effects, set up your work environment carefully, using the guidelines that follow, and take frequent breaks to rest tired muscles. To make working with your computer more comfortable, allow enough space in your work area so that you can change position frequently and maintain a relaxed posture.

Another type of musculoskeletal concern is repetitive stress injuries (RSIs), also known as cumulative trauma disorders (CTDs). These problems can occur when a certain muscle or tendon is repeatedly overused and forced into an unnatural position. The exact causes of RSIs are not totally understood, but in addition to awkward posture, such factors as the amount of repetition, the force used in the activity, the individual’s physiology, workplace stress level, and lifestyle may affect the likelihood of experiencing an RSI.

RSIs did not suddenly arise when computers were invented; tennis elbow and writer’s cramp, for example, are two RSIs that have been with us for a long time. Although less common than other RSIs, one serious RSI discussed more often today is a wrist problem called carpal tunnel syndrome, which may be aggravated by improper use of computer keyboards. This nerve disorder results from excessive pressure on the median nerve as it passes through the wrist to the hand.

This section offers advice on setting up your work area to enhance your comfort while you use your computer. Since the effects of repetitive movements associated with using a computer can be compounded by those of other work and leisure activities to produce or aggravate physical problems, proper use of your computer system must be considered as just one element of a healthy lifestyle.

No one, of course, can guarantee that you won’t have problems even when you follow the most expert advice on using computer equipment. You should always check with a qualified health specialist if muscle, joint, or eye problems occur.

74Appendix A

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Contents User’s Guide Apple Computer, Inc Contents Troubleshooting Expanding Your Computer and Using Special FeaturesAppendix a Health, Safety, and Maintenance Tips IndexFCC statement Radio and television interferenceDOC statement Vcci statement CD-ROM driveKeyboard Computer power cord Mouse Optional security screws Macintosh computer Keyboard cableGetting Started Plugging in the computerWhen you are ready to begin, follow these steps Installing an expansion card Connecting the mouse and keyboard Connecting a keyboard with a separate cableConnecting other equipment Connecting a keyboard with a built-in cableTurning the computer on for the first time Hard disk icon Macintosh desktop Problems starting up? What’s next? Learning the basics Slide your mouse along your mouse pad or deskReviewing the basics Guide h menuTurning the computer off You can also shut down your computer from the keyboard Turning the computer onClick Shut Down Guide menu Where to find answersThis book Other manualsGetting Help Getting answers to your questions Getting answers with the Topics button Macintosh Guide window, click the Topics buttonNow continue with the next section Click Setting Options in the list of topicsSmall window appears with instructions for you to follow Read and follow the instructions in this windowGetting answers with the Index button Macintosh Guide window, click the Index buttonRead and follow the instructions in the window Getting answers with the Look For button Macintosh Guide window, click the Look For buttonIf you want to close Macintosh Guide, click here Tips for using Macintosh Guide Identifying objects on the screen Learning useful shortcuts Main Macintosh Shortcuts window appearsClick one of the category buttons Expanding Your Computer ¸ Screen control Buttons Your computer at a glanceBuilt-in microphone Sound control buttons Stereo speakersConnecting additional equipment Using the sound control buttons on your computer Using the screen control buttons on your computer Using the built-in microphone Doing so may damage your equipmentConnecting to a network Installing internal drives Expanding memoryInstalling and Using Application Programs Installing application programs Working with several programs at a time Switching programsFinding out which programs are open Backing up your files Hiding and showing windows on the desktopWhen you have questions When you run into troubleTake your time Start over Rebuild your desktop regularly Click OKComputer is turned on but the screen is dark Solutions to common problemsComputer’s clock keeps time inaccurately Chapter Sad Macintosh icon appears and the computer won’t start up Hard disk icon does not appear on the desktopIcons do not appear correctly on your screen Your Macintosh can’t read a floppy diskPointer 8 freezes on the screen Pointer 8 doesn’t move when you move the mouse Dialog box with a bomb appearsTyping on the keyboard produces nothing on the screen Chapter Troubleshooting You see a message that an application program can’t be found You experience problems using a document from a DOS computer Initializing a hard disk When do you need to initialize a hard disk?Starting up from a CD-ROM disc Shut down your computer Starting up from a floppy diskCD-ROM disc will remain in the CD-ROM drive Turn on the computerDouble-click the Internal HD Format icon to open it When initialization is complete, click DoneReinitializing your computer’s internal hard disk Type a name for your disk in the Name boxInitializing an external Scsi hard disk Open the Apple HD SC Setup iconClick Drive until the disk you want to initialize appears Click Init to initialize the hard disk Try these suggestions first Repairing a damaged diskWhen do you need to repair a disk? Disks can become damaged by repeated use and handlingOpen the Internal HD Format icon Testing an external Scsi hard diskChecking for damage on your internal hard disk Choose Scan All Blocks from the Functions menuClick Drive until the disk you want appears Open the Disk First Aid icon How to repair a hard disk or floppy diskClick the icon of the disk you want to test If Disk First Aid cannot correct the problem Click Repair to begin testing and repairing the diskWhen should you install system software? Installing or reinstalling system softwareWhen should you reinstall system software? Open the Apple HD SC Setup program Installing system softwareFind and open the Disk First Aid icon Easy Install dialog box appears Doing a clean installation of system software To do a clean installation, follow these steps Find and open the Apple HD SC Setup iconFollowing dialog box appears Hold down Shift-x-K to start the clean installationClick the Install New System Folder button and click OK Click ContinueIt takes a few minutes to complete the installation Click Clean InstallDoing a custom installation Choose Custom Install from the pop-up menuRestart your Macintosh Appendix a Health, Safety, and Maintenance Tips Health-related information about computer useMusculoskeletal discomfort Eye fatigue Arranging your officeShoulders relaxed Avoiding fatigue What about electromagnetic emissions?Safety instructions Handling your computer equipment Handling the built-in monitor Handling the keyboardHandling floppy disks Ejecting a diskPower supply If you can’t eject a floppy diskCleaning the monitor Cleaning your equipmentCleaning the computer case Cleaning the mouseRotate the rollers to clean all around them Locking and unlocking the mouse Recessed area on ring Recessed area surrounding ringTo unlock the mouse, follow these steps Appendix B Installing an Expansion Card Opening the computer Installing an Expansion Card Remove the two retainer screws from the vertical plate Remove the plastic access cover from the vertical plate Installing a processor-direct slot PDS cardAlign the card over the processor-direct slot Remove the communication card from its static-proof bag Installing a communication cardCommunication slot is the rightmost slot on the logic board Align the card over the communication slotClosing the computer Press the reset button Reinsert the two retainer screws into the vertical plate Replace the back panel of the computer Caps Lock key Clear key Command key Special keys on Apple keyboards Arrow keysDelete key Power key Return keyControl key Enter keyIndex Index Index Index Index Index Index Apple Publishing System