URGENT my computer wont start correctly

cjcj11

Distinguished
Oct 17, 2012
222
0
18,690
i finally got my r9 290 in today and i installed that in my system, so then i put my radeon 7870 into my brothers computer along with a 7770 for mining scrypt, i install the radeon 7870 as the main card with the hdmi plugged in and i go to uninstall the amd drivers so i can reinstall for the new hardware, and as soon as it starts i get a blinking green screen and nothing else, what has happened how do i fix? it doesnt even display the boot screen for bios options. i am about to start removing cards/replacing to see what works, does anybody know whats going on?