''dc swat'' please help

[grover29]

5

i have f355 orginal ntsc -j nice crystal clean game disk

after sega inro freezing white screen

i tried all the region one byt one back up copies result same

freezing same point at game im order sd adapter

im ripped game from orginal disk with dreamshell than convert gdi to optimized gdi notting to changed

i think so problem is not gd-rom or lens replacement

because im tried also boot same game from sd iso

couple of games also doing same thing resident evil 3 and code veronica

do you have any idea what is exactly problem could you explain me