Built my PC about a year ago and everything has been working perfectly until now.

Specs:

- CPU: AMD Ryzen 7 7800X3D

- GPU: Radeon RX 9070 XT

- Dual boot: Linux + Windows

I was using Linux without any issues most recently, then rebooted into Windows. It started a Windows update, completed it, and restarted.

After the restart:

- No display output at all (no BIOS/POST screen)

- Fans ramp up to 100% immediately

- Can’t access BIOS or boot menu

I’ve already tried:

- Power cycling multiple times

- Holding power button to force shutdown

Important detail: system was working perfectly just before this when I was in Linux.

What could be the issue and how to fix it