Can’t Access BIOS: Stuck on Splash Screen

I've been having some issues with my PC lately where I can't get into the BIOS anymore. It used to take a few tries, but now pressing keys like DEL, F10, or END just freezes the system on the splash screen, and I have to power it off manually. If I don't press any keys, Windows boots up just fine. I considered the BIOS chip might be dead, but since I can still boot into Windows, that seems unlikely.

Here are my specs: 9950X3D, Palit 5090, G Skill Trident Z5 32x2 DDR5 6000mt/s, X870E Aorus Elite Wifi 7. I've already tried several troubleshooting steps:

- Cleared the CMOS by shorting the jumper
- Used the Q-Flash Plus Utility with different BIOS versions (but GCC doesn't show my BIOS info)
- Removed all peripherals except a different keyboard
- Took out one RAM stick
- Used a different monitor via the motherboard's HDMI
- Accessed Windows recovery to select UEFI firmware settings
- Used the shutdown command that typically brings up the BIOS automatically.

I'm open to any other suggestions to avoid going through the long RMA process with Gigabyte.