My Dell XPS 15 9530 from 2014 no longer seems to be able to connect via HDMI to TV or projector since I upgraded from Win 8 to Win 10. It worked before. I get "no signal" on the second screens.
Spent half a day already on this, googling and trying the following:
* Updating to the latest Dell drivers, Windows updates, and Nvidia updates. * Disabling either of Intel (HD Graphics 4600) or Nvidia (GT 750M) graphics cards * Rolling back to older versions of display drivers * Trying different HDMI cables * Running Dell's diagnostics tool * Lowering screen resolution * Restarting everything
But nothing works.
The external screens don't show up in Screen Properties. Pressing Fn+F8 brings up the four choises (Duplicate etc.) but nothing happens when I click any of those options.
Some posts I found via googling seem to suggest that Win 10 simply isn't compatible with HDMI in some laptop/graphic card/CPU configurations. Can this really be the case, or what can I do?