V1 screen only works in rcm-mode

I been looking everywere for somthing like my issue and no luck. Got a v1 that one day went to use portable and had a black screen… everything work fine in dock. Crazy part is screen works fine in RCM-mode. But as soon as u go to boot black screen. Touch still works fine.really dont make any sence. Is it posable screen only can work in low resolution during rcm-mode. And dont work in high resolution?