a DVI-VGA adapter/converter may not work with the mobos DVI port and your monitor has no DVI port ?
then you are all set for the test the reason why a DVI-VGA adapter will not work ? because the adapter requires analog signals provided by DVI-I which DVI-D can't provide.
Hi Bro many times when you use a graphic card other than onboard graphic card than bios disable on board graphic card, so you can try to go into bios and enable your onboard graphics card from bios its worth trying.
All this dvi D's, I's is getting me confused. Let me get the convertor and check once.
Want to avoid asus rma at any cost
Check the screen shots in first post. There is no option at all to enable iGPU. What I heard is that bios disables that option if it detects a dGPU.
After removing dGPU, monitor (connected to iGPU slot) has no display.
have you err ...tried installing the intel hd grafix drivers?