Does your pc come with a buzzer? If it does, take out the ram, gpu and everything else except Mainboard and CPU. Power up and see if it beeps, if it doesn't beep at all, it could be a faulty Mainboard / CPU / PSU; if it beeps, mainboard and CPU are most likely fine. Check the post beep code to figure out what went wrong.
This post has been edited by Mooladdin: Oct 14 2021, 10:52 PM
Hardware PC no display, no post, no windows, AMD Ryzen 2700x, Gigabyte Aorus x470