Black screen while installing Debian 8.8

I wanted to install Debian 8.8 on my laptop which was using ubuntu 16.04 LTS. I downloaded the netinst and used rufus to burn it on a USB. I booted on the USB and I got the menu screen, but when I select install or graphics install I get a black screen (but the backlight is on and my external monitor on hdmi is not connecting). If I disable Uefi, I can get passed the problem; but grub fails to install. I tried to install Ubuntu again but the laptop's display (blacklight is on) does not work but my external monitor does. BTW I'm trying to install the OS on my nvme ssd which worked on the Ubuntu not Debian. My question is, what is wrong and how do I fix this? My laptop has: - Intel i7 7700HQ - 2x 8gb corsair ram - nvidia gtx 1070 - 250gb Samsung 960 evo nvme ssd - 1tb seagate hdd Edit: I just went on try Ubuntu before install and ran xrandr - - listmonitors and I only got the output of the external hdmi monitor.