If the problem recurs, you may need to reinstall system software. See “Installing or Reinstalling System Software” later in this chapter for instructions.
mYou 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).
mThe keyboard is not connected properly.
Turn off the computer using the power switch, then check that the keyboard cable is connected properly at both ends.
If you have a keyboard with an ADB port (marked with the ◊ icon) on each end, turn off the Macintosh using the power switch and plug the keyboard cable into the other ADB port on the keyboard. (You may have to unplug the mouse to do this.) Then restart the computer.
Many Macintosh computers have two ADB ports on the back panel. Also, some monitors have one or two ADB ports. Turn off the Macintosh using the power switch and connect your keyboard cable to a different ADB port on the computer or monitor. Then restart the computer.
mThe keyboard is damaged.
If you have access to another keyboard, try using it instead. (Turn the computer off before connecting it.) If the new keyboard works, there is probably something wrong with the one 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
