- Which MacOSX version do you run on your PowerMac G5? If it is still 10.4.x (Tiger), you can run the Classic environment inside MacOSX and you do not need an emulator.
- Which SheepShaver build (date of the build, not version number) do you use and how did you create a drive image? Using the 25-10-2009 build and following the current setup manual, you would not be able to access the SheepShaver preferences to create a drive with only a black screen.
Did you configure for full-screen mode using the SheepShaverGUI or SheepShaverPrefs application? Older SheepShaver builds for MacOSX will indeed only show a black screen when configured for full-screen.
Best start again using the 25-10-2009 build, it is the one that is best tested on Leopard and later. Follow the setup manual, use the built-in preferences editor and start configuring in window mode. See sticky topic at the top of the SheepShaver forum for download and information:
To be able to start again, you will need to delete the (invisible) ~/.sheepshaver_prefs file first. You can do that with the script that you can download here:
http://www.xs4all.nl/~ronaldpr/sheepsha ... cripts.zip
(I am not sure you can run your games in SheepShaver on TV out.)