Im using an ASrock A520-HDV motherboard, and when i was rebooting my computer to boot it into windows (i have windows 10 and arch linux installed) it showed the grub menu for 1 second and then the screen went totally black, so i pushed the reset button of my case, but when i did that the computer didnt POST and it started to beep 3 consecutive times followed by 1 beep, then stopping and doing it all over again, i reseted the cmpuer with the power supply and it booted normally, but i want to know what those beeps mean, i also checked the motherboard's manual and it doesnt say anything