Macintosh LC 630: Screen Control Panel and Beeping (6/95)
Article ID:
Created:
Modified:
18038
6/27/95
6/28/95
TOPIC
What could cause a Macintosh LC 630 computer to beep when trying to wake up after the After Dark Screen Saver has come on?
DISCUSSION
System 7.5 and later versions of System 7.1 that shipped with the all-in-one 500 series Macintosh computers include a control panel called Screen. The Screen control panel is designed primarily for use on all-in-one style Macintosh computers, such as the Macintosh Performa and LC 500 series.
Included systems are:
Macintosh Performa 550, 560
Macintosh Performa 575 series
Macintosh LC 520
Macintosh LC 550
Macintosh LC 575
Macintosh LC 580
You can set the Screen control panel to automatically dim the screen after a certain amount of time. After the selected period of time has passed without mouse movement or keyboard input, this control panel will dim the screen and "put the system to sleep." Upon moving the mouse or pressing a key on the keyboard, the image will come back up but you will not be able to click the mouse or type until the beeping stops, usually about ten seconds.
The Screen control panel will also load and allow you to turn it on but will not dim the external monitor on these systems:
Macintosh LC 630
Macintosh Quadra 630
Macintosh Performa 630 series
Macintosh Performa 640 series
In this case, the Screen control panel tries to put the machine to sleep, but the external monitor still displays the image. When you move the mouse or press a key on the keyboard, the control panel senses your input and starts beeping as if it is working normally.
You are seeing After Dark running and when you move the mouse you, are hearing the Screen control panel "wake up" your Macintosh. Since the Screen control panel is not working as intended you should turn it off or drag it out of your System Folder.