I saw someone having the same issue of everything working except no video on the same mobo as me
is their supposed to be a cmos header on the *default* pin set? because I don't have that and they said that once they did that it worked fine.
What motherboard do you have? it should tell you in the manual how to clear the CMOS.
I didn't need to clear the cmos i needed the header, motherboard didn't have it and didn't mention it (maybe it was separate and i lost it) a comp. Toolkit i bought had a bunch and its been fine since