[Solved] - Tower's 1st [no, 3rd] Hard-Reset since clean-reinstall.

[kdemeoz]

I can no longer even boot back into BIOS to return that setting to default, because the screen simply receives no signal. Oh my goodness.

Don't forget to put the hdmi/dvi cable to the other card (the internal one) if you switch to using the internal onboard Intel instead of the dedicated pci express nvidia one

Thanks... writing this still from Lappy not Tower  :-( 

Managed finally to remove the nvidia card, boxed up the case again, reconnected all the rear cables, & yes i did this time connect the monitor's HDMI cable to the only other remaining HDMI port [so logically that must be for the Intel, i presume]. Then i booted...

Groan, still black screen.

However, i have now rebooted it at least a dozen times, each time trying a number of key combinations to try to get back into BIOS [bearing in mind that as i cannot see anything, i'm going by memory]. Still have not succeeded. I have however, somehow, two times, generated a normal-looking Maui 1st splashscreen, but once again it leads to a black screen. I have from here though been able to tty, in which i ran inxi -Fxz, which of course now only shows a single gpu [Intel], BUT... for driver, says "FAILED: nouveau". Why is it doing that? Why is it not using the Intel driver? How do i fix this pls?