Big Dreamcast System Problem reading Boot Disc

[KronoLeginaire]

Hey,

My problem is that my dreamcast won't read all my burned games and it won't read any boot discs, even when burned properly. I've tried differnt burners, and have tested a boot disc on a differnt system which I ran fine on but won't run on mine. When I try the boot disc it get as far as the sega logo and either sits there forever or goes to a blank white screen. I have some moves with Gypplay and want to run them, please help. Thankz!