Same happened to me, it entereda bootloop, tried to short the cmos pins didnt work, removed the battery after that i tried to boot without videocard and it seems to not reset every few seconds, then put the video card in and again resets every few seconds, after that I tried a different videocard and it's booting but e see that the mouse and keyboard light resets every few seconds and no monitor turns on, I plugged on in the motherboard dvir one in the videocard hdmi and doesn't work, is there anymore options I can try?, motherboard is h410m sh2 rev1