Question asus prime z790 P Wifi cant enter BIOS

Apr 5, 2023
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Hello, i just bought Asus Z790 prime P Wifi + I5 13600KF + DDR 5 Kingston fury black 6000mhz (exactly that one, which is at support list). At first boot, i get into BIOS right after start the computer,, just saved what was predefined, boot to windows with any problem...

But, i am not able to get to the bios again. Every time when i tried, it happend nothing. Just black screen. Iam able to boot to windows, but every time when i am pushing F2 or delete right after start, to the VGA input go just black screen and nothing happened, like its frezeed (i wait even more than 5 minutes)... after that without pushing F2 or delete, it goes to windows,without problem.

Tried to remove both SSDs (to force MOBO go to bios), but it happens the same - just black screen, like when i am pressing F2/delete at POST to get to Bios.. I am able to get there only first time (after reseting CMOS, remove the battery) At second time a did and firmware update of MOBO to the last version.. but Still the same..

I am desperate, any advice? Thanks guys.

Asus ROG RTX 3060Ti, SSD M2 Kingston 1000, Corsair RM 750x.