Check the startup disk and program you were using when the problem occurred. Make sure that all programs, desk accessories, and system extensions you’re using are compatible with the system software. Try starting up the computer with the Utilities floppy disk or, if you have a built-in CD-ROM drive, with the Macintosh Performa CD. (For instructions on how to start up your computer from the CD-ROM disc, see “Starting Up From a CD-ROM Disc” in the section “Repairing a Damaged Disk” later in this chapter.) If your computer starts up normally, there may be an extension conflict.

mSometimes incompatible system extensions or control panels can cause system software problems. Restart while holding down the Shift key; this temporarily turns off all system extensions. If your computer works normally after you do this, use the Extensions Manager control panel to turn on extensions and control panels one at a time. Restart after you turn on each extension. This procedure should identify any incompatible extensions.

For information on using the Extensions Manager control panel to manage

system extensions, see the “Setting Options” topic of Macintosh Guide, available in the Guide (h) menu.

If the problem recurs, you may need to reinstall system software. See “Installing or Reinstalling System Software” later in this chapter for instructions.

mThe mouse is not connected properly.

Turn the computer off using the standby power button, check that the mouse and keyboard cables are connected properly, and then restart the computer.

mSignals from the mouse are not reaching the computer, either because the mouse needs cleaning or because there is something wrong with the mouse.

Clean the mouse according to the instructions in Appendix A of this book.

If you have another mouse or pointing device, try connecting and using it. (Turn off the computer before connecting it.) If the new device works, there is probably something wrong with the mouse you replaced.

If none of these procedures solves the problem, consult the service and support information that came with your computer for instructions on how to contact an Apple-authorized service provider or Apple for assistance.

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Apple 600 series manual Troubleshooting
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600 series specifications

The Apple 600 series, part of Apple's innovative line of personal computers, represents a significant milestone in the realm of computing technology. Launched in the early 1990s, this series was designed primarily for educational and business environments, offering an array of cutting-edge features that catered to users’ evolving needs.

One of the defining characteristics of the Apple 600 series is its capability to handle a variety of tasks with impressive efficiency. Powered by the Motorola 68040 processor, which was lauded for its advanced performance, the series delivered an optimal balance of speed and power consumption. This made it a reliable choice for users requiring multitasking capabilities, be it in classrooms or corporate offices.

In terms of memory and storage, the 600 series was quite flexible. With configurations supporting up to 36 MB of RAM, users could easily upgrade to achieve better performance suited to their specific applications. Additionally, the built-in hard drives provided ample storage space, allowing users to manage and save critical documents, multimedia files, and educational software without running into space constraints.

Another notable feature of the Apple 600 series was its multimedia capabilities. The inclusion of a high-quality color display and support for various audio and video formats provided an engaging experience. This was especially beneficial in educational settings where interactive learning was becoming increasingly popular. With a variety of peripheral options available, users could enhance their computers with scanners, printers, and external storage devices, expanding their functionality further.

On the connectivity front, the Apple 600 series supported various networking options. It provided users with the ability to connect to local area networks (LANs), facilitating easy sharing of resources and information. This connectivity was critical for institutions looking to adopt more collaborative and interactive learning environments.

The Apple 600 series also incorporated an intuitive user interface, showcasing the signature appeal of Apple products. The operating system was designed to be user-friendly, accommodating both novice and experienced users alike, which contributed to its popularity in educational contexts.

In conclusion, the Apple 600 series is remembered for its remarkable performance, versatility, and user-centric design. With its advanced technology and features tailored for educational and business use, this series played a significant role in pushing forward the capabilities of personal computers in the early 1990s and remains a part of Apple's storied legacy in the technology world.
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