Blackscreen after enabling Secure Boot

[DerFilmeFuchs]

Hi, 

I bulid my new pc this weekend and everything went great. Easy start, benchmarks looking good. 

Today i wanted to play Valorant but the game gave me a errorcode and basiclly told me to enable secure boot and tmp 2.

When i enabled secure boot in the bios, it said "not active" and that i need to activate a PK to enable secure boot. So i went to the PK Option and Just picked the Default on. Also the Secure Boot Option was set from standard to Custom. I saved and restarted. Now all i get are blackscreens. No BIOS No Windows. I tried to clear CMOS by shorting the to Pins for it (Mainboard: Gigabyte Z690 UD) and i took the battery out for around 3 minutes. Didn't Work.... Do i have to Q-Flash my BIOS? Any Tips? 

Would really appreciate the Help.

 

P.s This is my first time posting here. So i dont really know the rules on how to ask for help here also als you guys can probably tell, english is not my first language so sorry for any spelling problems.

 

Cheers,

Max