“Did I make a mistake in not un-installing my broken down video card’s drivers Before going onboard?”
Safe mode, and ‘install new hardware’ IIRC.
I tried the safe mode option and can actually boot using the mode but before the home screen loads I get that Frequency message and eventually the monitor shuts off.
I can’t get anywhere beyond that message!?
You will need to go into the CMOS setup and enable the on-board card. When it first starts to boot there is usually a (sometimes very) brief message that says something like “Press F? for setup”.