9000 crashes/black when starting cam

any help here please. i am running E2 on usb.i have moved from one house to another,now black screen/crash when mgcamd starts.i have changed hdmi-scart via ftp. problem i have is everything loads up on screen till mgcamd starts,then screen is black with no communication via ftp.i have managed to change cam to camd3 but same results. any ideas in helping me get back in without changing image? thanks