Hey all, I just removed my 980ti ftw to send in for step up, now I'm not getting any video signal from sabertooth z97 onboard graphics.  How can I make onboard graphics work?

Enable it in the Bios, you will have to Reset your Bios to do this. (Clear CMOS switch) on the MB or Real Panel.
Before you removed your card for step-up did you Remove the Drivers and run DDU to clean out your computer?
This needs to be done before you install your new step-up card.

Moving to general hardware. This is an ASUS board in question.

You can always clear your CMOS to reset your bios settings back to factory defaults.