Did my MoBo randomly die on me?

Motherboard is a GIGABYTE B550 board. While shutting down my PC I realized that the monitors went dark but the fans were still spinning and the LEDs remained on. I ended up forcing shutting it down by flipping the PSU switch. However since then I've been unable to get my PC to boot: fans spin,LED comes on, keyboard but not the mouse, lights up and nothing on the screen. No bios screen or anything.

I've tried: -Reseating GPU - Reseating RAM - Reseating CMOS battery - Tried plugging in a random USB into the BIOS slot and pressing the Q flash button but I don't even get the LED I'm assuming even if the usb is empty the LED should light up)