G4 Cube boots to black screen after grey Apple

i have g4 cube i've installed tiger on.

now, once boots, go blank screen once should go blue screen.

work 100% vga monitor, apple cinema isn't game.

pleeeease

 

try resetting pram, 3 chimes @ least.

or, boot vga monitor , select resolution cinema display can handle, shut down , connect cinema display , try again.

if can't determine supported resolutions cinema display, select low res 640 x ???.

cinema display it? have method of testing cinema display on machine checking supported resolutions work?

 

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