i installed snow leopard 10.6.3 on my laptop ( toshiba qosmio f60-10j ) and with install dvd or booting hard disk, the screen goes blank ( like if the laptop is in seleep/off ) just after the grey os x loading screen, but all works fine if i connect a vga external monitor.
i don't know what to do.
Any idea ? :/
EDIT : the gpu is a nvidia gt 330m, also i can set the 1920*1200 on my external vga display