Sync On Green
Quadra 700 (programmable *)
Quadra 800
Quadra 900 (programmable *)
Quadra 950 (programmable *)
Centris 610
Centris 650
Quadra 610
Quadra 650
Note: The programmable feature refers to the fact that the computer automatically disables the sync on green signal whenever the sense lines detect that a VGA monitor is connected.
Questions and Answers
Question: Why is Sync on Green not supported on all computers?
Answer:1. Many users have had problems with sync on green when hooking up third- party monitors; mainly multi-frequency displays from the PC world. Since these displays are increasingly being used with Macintosh, the lack of sync on green increases the number and compatibility of displays available.
2. The current popular video standards, VGA and VESA, dictate using separate sync signals, not sync on the green video.
3. No current Apple monitors support sync on green.
4. The new monitors with power-saving modes (monitors which can be put to sleep, thus consuming less energy) typically use the separate sync lines to signal the monitor to enter a low power state. Since separate sync lines run to the monitor anyway, sync on green does not make sense.
5. The ability to strip sync off the green video adds cost and complexity to a monitor.
Question: My monitor will not work without sync on green, how can I get
Answer: Unfortunately, there is very little you can do about this problem. This seems to affect only one or two major Macintosh display manufacturers, and affects only some of their displays.
The cable or adapter doesn't pass separate sync lines to the monitor
This is easily fixed by replacing/altering the cable or adapter. Companies such as Griffin Communications provide adapters to provide the sync on green capability.
PLEASE NOTE: One of the main reasons cables and adapters don't pass through the separate sync lines is because sync on green is there in the first place. Since the sync signal on green video causes some monitors to display a greenish tint when they see (and therefore use) the separate sync signals, simply not passing the separate sync signals to the monitor cures the problem. This workaround will fix the problem on a majority of the monitors available.