When you start up, a disk icon with a blinking question mark appears in the middle of the screen.

This icon indicates that your Macintosh cannot find the system software it needs to start up. One of the following is probably the cause:

mYour computer may be having a problem recognizing external equipment that uses the Small Computer System Interface (SCSI).

Turn off all external SCSI equipment and disconnect the first SCSI device in the chain from your computer’s SCSI port. Then restart the computer. If the computer starts up after you disconnect your SCSI equipment, refer to the manuals that came with the equipment for information on the proper way to connect SCSI equipment and assign SCSI ID numbers.

If you have a printer connected to your computer’s SCSI port, make sure your printer is not supposed to be connected to the printer port instead. Check the manuals that came with your printer for information on how to connect it properly.

mSystem software is not installed on the startup hard disk, the system software is damaged, or the hard disk is not working properly.

Start up your computer using the Utilities floppy disk or, if you have a built- in CD-ROM drive, using 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.) Then follow the rest of the instructions on repairing a disk to test your startup hard disk and repair any damage.

If repairing the disk doesn’t help, follow the instructions in “Installing or Reinstalling System Software” later in this chapter to reinstall system software on your startup hard disk.

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Apple 600 series manual Chapter

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.