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Lenovo Yoga 920 - debian installer goes black

I'm trying to install the latest weekly build debian-installer netinstall image on a Lenovo Yoga 920 (with the non-free drivers - same result as the official build). I also tried the latest stable for good measure. 
The initial screen (Debian UEFI installer menu) displays. It's possible to go to Grub too.
As soon as I select either graphical install or install, the screen backlight seems to go off / the screen goes black.
The Ubuntu installer does not have this problem. Is there a way to modify the ubuntu installer to initiate the debian installer for instance? (I've seen reports of Fedora installing on this laptop too.)
Best regards,