PC Won't boot but MB LED flashing

Hello Everyone,

My PC spec is the Asrock B550M Steel Legend MB, AMD 5900x CPU, and 3080ti GPU.

My PC suddenly shut off while I was playing a game, and now it won?™t turn on. The fans do not spin when I push the PC power-on button. However, the on-board LED lights flash white when the PSU is turned on.

I have attempted the following troubleshooting steps:

Cleared the CMOS by removing the CR2032 battery
Used the back clear-CMOS button
Held the power button for 15 seconds

Unfortunately, none of these steps resolved the issue. Do you guys have any clue how to fix this issue?

Thank you for your assistance.