Service Manuals, User Guides, Schematic Diagrams or docs for : apple imac

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K Service Source




          iMac
K Service Source




    Hot Issues
           iMac
Hot Issues                                                 Introduction - 1

             Introduction
             This chapter is designed to highlight unique or high-
             priority product issues that you should be aware of before
             servicing the iMac computer.

             This chapter alerts you to important issues and provides
             pointers to other areas in the manual where more complete
             information can be found. This chapter is not intended to
             replace other parts of this manual; it merely provides a
             pointer to pertinent information in those chapters.

             To familiarize yourself with a new product family, always
             read the Basics chapter in its entirety. You should also refer
             to the Troubleshooting chapter for basic theory of operations
             information.
Hot Issues                                     Mixed Memory Types - 2

             Mixed Memory Types
             The iMac computer uses SDRAM SO-DIMMs only; EDO
             memory will not work in the iMac computer. System
             problems will result if EDO memory is installed. (See
             "SDRAM DIMMs" in the Basics chapter and refer to the iMac
             section of the Memory Guide.)

             Note: Customers are allowed to upgrade the memory in
             iMac computers and may inadvertently mix EDO and SDRAM
             memory. If incompatible memory types are installed, you
             will hear two beeps upon startup. (See "Power-On Self
             Test" in Troubleshooting for more information.)
Hot Issues                                      Mixed Memory Types - 3

             SGRAM Video Memory
             The iMac computers use SGRAM video memory. Use only
             SGRAM SO-DIMMs in these machines. Never install the
             256K or 512K video memory DIMMs used in older
             Macintosh computers. (See "SGRAM Video Memory" in the
             Basics chapter.)

             Error Beeps
             If problems are detected upon startup, the iMac system will
             sound one or more error beeps. (See "Error Beeps" in the
             Troubleshooting chapter.)
Hot Issues                                HFS Plus Formatted Drives - 4

             HFS Plus Formatted Drives
             The iMac hard drive is formatted from the factory with Mac
             OS Extended format, also referred to as HFS Plus. Norton
             Utilities version 3.5 is not compatible with HFS Plus and
             version 3.5.1 and earlier can result in hard drive
             corruption and loss of all data on the hard drive. (See "HFS
             Plus Formatted Drives" in the Troubleshooting chapter.)
Hot Issues                                            Forcing a Restart - 5

             Forcing a Restart
             If holding down the Command, Control, and Power keys fails
             to restart the iMac computer after a system hang, you can
             force a restart in one of two ways:

             First, try inserting a straightened paper clip in the reset
             button hole. (Open the I/O door on the side of the iMac. The
             reset button hole is the top hole located between the Ethernet
             and modem ports and marked with a triangle symbol.)

             If the reset button method doesn't work, try the following:
             1. Unplug the power cord.
             2. Wait at least 30 seconds and then reconnect the power
                cord.
             3. Restart the iMac by pressing the power button on either
                the keyboard or the front of the computer.
Hot Issues                              External Displays Not Supported - 6

             External Displays Not Supported
             Connecting an external display to the iMac is not supported by
             Apple. The db-15 port on the iMac was not designed to support
             an external monitor. Apple designed iMac with a very sharp,
             15-inch internal display and no video-out port to connect a
             second display.

             Refer to Tech Info Library (TIL) article #43016, "iMac: Can I
             Attach an External Display?" for more information.
Hot Issues                                               iMac Updates - 7

             iMac Updates
             Apple has released a number of updates for the iMac. Refer to
             TIL article #58174, iMac: When to Install Available
             Updaters. This TIL article will clarify when to use the
             available updates depending upon which version of iMac you
             have.

             Additional iMac Update articles:
             

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