pull all hardware out except cpu and video card and try it..if still broke-pull battery out, reset bios settings to default, change power supplies. If still dont work and memory works elsewhere -its mobo.
RYZEN 5 2600|RADEON 570| |ASRock X370 Killer|DDR4@2800Mhz||Corsair SPEC-05 Case|AOC G2590FX 24.5''144hz 1ms|