strange problem with black screen

[tomypeng]

I found a strange problem, everything goes well on my remote computer, but when I restart my remote computer connect to it shows a black screen. It seems everything goes well but can't display anything. When I connect my remote computer VGA card to monitor, it will display desktop and works good.

I tried to restart in safemode, it works, I can connect it and display desktop. I uninstall VGA driver in safemode then restart in normal model, it works.

At begining I think maybe there is some promblem with VGA drivers(I have a AMD 7850 card in remote computer), but when I install different version drives, it still show a black screen.

Is anyone can help me?Thanks!