5.


 

6.

7.

Turn the mouse back upside down. If there is any material in the hole on its bottom, gently pick it or shake it out. Do not try to blow it out. This may just drive the material farther inside. Do not attempt to wash out the cavity or use solvents in it.

Place the clean ball back in its hole.

Replace the plastic disc, orienting it so that the mark on its rim is near the letter 0. Turn it one-eighth of a turn clockwise, bringing the mark to the letter L. This should lock the disc in place.

The image on the screen is rolling or out of alignment.

The Apple IIGS is sending signals to the monitor according to the foreign standard (50 hertz) instead of the U.S. standard (60 hertz).

Press Option-Control-Reset and then press 2. This restores the standard Control Panel settings for the U.S., including the standard frequency of 60 hertz.

Text is fuzzy and unreadable.
(You've already checked to make sure the monitor cable is plugged securely into the computer.)

You're using a television set or a color monitor as a display device, and the application is displaying text in 80-column font. Television sets and some color monitors don't have sharp enough resolution to display the smaller character size. If that's not the problem, maybe the contrast is too bright or too dim.

If the application gives you a choice between a 40-column and an 80-column display, choose 40.

If the Application doesn't give you a choice, use the Control Panel Program, explained in Appendix A, to change the Columns option to 40. If that isn't the problem, try adjusting the contrast knob on your monitor.

Trouble with the display

139