Apple Power Macintosh 4400 - Manual (Page 101)

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 from the CD-ROM disc that contains system
software. (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
“Initializing a Hard Disk” later in this chapter.) If your computer starts up
normally, there may be an extension conflict.
If the problem recurs, you may need to reinstall system software.
See “Installing or Reinstalling System Software” later in this chapter
for instructions.
Typing on the keyboard produces nothing on the screen.
One of the following is probably the cause:
m You haven’t selected any text or set the insertion point (i).
Make sure the program you want to type in is the active program. Then
place the pointer (8
) in the active window and click to set an insertion
point (i) or drag to select text (if you want to replace the text with
your typing).
m The keyboard is not connected properly.
Turn off the computer by pressing the power button on the front of the
computer. With the computer off, check that the keyboard cable is
connected properly at both ends.
m Your system has a software problem.
Restart your Macintosh. For instructions, see “Start Over” in the section
“When You Run Into Trouble” earlier in this chapter.
Check the startup disk and application program you were using when the
problem occurred. Make sure that all the programs, desk accessories, and
system extensions you’re using are compatible with the system software.
(Refer to the instructions for checking system extension compatibility
given in the troubleshooting tip “A Dialog Box With a Bomb Appears”
earlier in this chapter.)
If the problem recurs, you may need to reinstall system software.
See “Installing or Reinstalling System Software” later in this chapter
for instructions.
101 Troubleshooting