Apple Power Macintosh 4400 - Manual (Page 99)

If you are trying unsuccessfully to use a floppy disk created in a PC (personal
computer), DOS (Disk Operating System), or Windows environment, consider
the following:
m When formatting floppy disks on a DOS computer for use in a Macintosh,
you need to format standard double-sided disks as 720K disks and high-
density disks as 1440K disks. Because DOS computers allow standard
double-sided disks to be formatted in 1440K format and high-density disks
to be formatted in 720K format, it’s possible that your disk has been given
a format that won’t work in a Macintosh.
If you think your DOS floppy disk might have a format that doesn’t work
in a Macintosh, use a DOS computer to copy the contents of your DOS
floppy disk onto another DOS floppy disk that has been properly formatted
for use in a Macintosh.
A dialog box with a bomb appears.
Your system has a software problem.
m Write down what you were doing when the message appeared, and write
down the message’s text and its number, if there is one.
m Restart your Macintosh. (See “Start Over” in the section “When You Run
Into Trouble” earlier in this chapter for instructions.) Most software
problems are temporary, and restarting usually corrects the problem.
m Check the startup disk and application program you were using when the
dialog box appeared. Make sure that all programs, desk accessories, and
system extensions you’re using are compatible with the system software.
Reinstalling the system software may correct the problem.
m Sometimes 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 (in
the Control Panels folder in the Apple [K] menu) to turn on individual
extensions and control panels one at a time. Restart after you turn on each
extension. This procedure will identify any incompatible extensions.
If your program performs better when a particular extension or control
panel is turned off, contact the software’s manufacturer for information or
an upgrade.
99 Troubleshooting