Apple Macintosh System 7.5 User Manual download pdf (Page 88)

Problems using System 7.5

This section helps with problems you might encounter using the computer

after you have installed System 7.5.

You can’t start up the computer

Problem: When you turn on your computer, you see a “bomb” message.

Cause 1: You probably have an incompatible item in the System Folder.

Solution 1: To turn off potentially incompatible items in the System Folder,

hold down the Space bar while you restart your computer. When the

Extensions Manager opens, choose “System 7.5 Only” from the Sets pop-up

menu. Close the Extensions Manager to resume startup. All extensions are

turned off, except those for System 7.5. Once you have started up the

computer, you need to determine which startup program is causing the

problem. For instructions, see Appendix C (“Testing for Compatibility”)

later in this book.

Cause 2: You may have damaged your system software.

Solution 2: Start up the computer using the Disk Tools disk. When you have

restarted the computer, follow the instructions in Appendix B (“Performing

a Clean Installation”) to reinstall system software.

Chapter 7

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Apple Macintosh System 7.5 User Manual Page 88