[SOLVED] My computer won't display

[Wiscaksono]

i try to enable secure boot for TPM 2.0 to play valorant exactly like this video

View: https://www.youtube.com/watch?app=desktop&v=F7OKdgwHpsU&ab_channel=AGamingTVAnd
i had to add new PK (key). then did the rest and had to restart my pc. however when i turned the pc back on, my monitors didn't have any input and im worried that i messed something up with the key that i changed and i can't revert it since the monitors won't turn on. i tried to reset my CMOS with unplugged the CMOS battery, short the CMOS jumper, but my display still won't turn on

i5-10400F
Klevv 2x8GB
Aorus B460M Pro (Latest BIOS firmware)
PNY RTX 3060
600W

 

[CountMike]

i try to enable secure boot for TPM 2.0 to play valorant exactly like this video

View: https://www.youtube.com/watch?app=desktop&v=F7OKdgwHpsU&ab_channel=AGamingTVAnd

i had to add new PK (key). then did the rest and had to restart my pc. however when i turned the pc back on, my monitors didn't have any input and im worried that i messed something up with the key that i changed and i can't revert it since the monitors won't turn on. i tried to reset my CMOS with unplugged the CMOS battery, short the CMOS jumper, but my display still won't turn on

i5-10400F
Klevv 2x8GB
Aorus B460M Pro (Latest BIOS firmware)
PNY RTX 3060
600W

BIOS has to be in UEFI (not CSM/Legacy) mode and Windows also installed in UEFI mode.