i have small problem starting live usb bt4 pre on advent 7555gx, when i try boot bt4 from live usb im getting message no "usable screen found" i dont know how to sort it out. laptop details monitor 17" quad core Q9000 ram 4 gig graphic ati hd 4850.


im trying start live usb bt4 pre final. laptop spec. advent 7555gx; Q9000 ati hd 4850 and win 7 ddr2 4gig.
i dont have any issues using vmware everything is working fine. but when i try boot from live usb im getting message "screens found but non of them are usable" is over here someone who could give me some advice please.