Hi all! I have a very old PowerMac 8600, that has the monitor out and has the S-Video Out too. The problem is that it sees a second monitor on the S-Video Out and the menubar and other controls of the system is moved to this second monitor. I have no TV to connect on it to restore the system. Any one can help me to disable this second monitor? The 8600 is running the MacOS 8.6 Thank you all!