I built it in November 2024 and its been working perfectly fine until a few days ago. I got back from a month break from uni for spring and when i got back the pc was turning on and off repeatedly when powered on but other than that was fine. Then a few days ago it stopped outputting any video and the red CPU led was lit up. I fixed both that and the powering off and on by flashing the BIOS, but there's still no video output from either the integrated CPU graphics or GPU.
I've tried a bunch of shit, this is my last hope before just buying a new motherboard as that is probably the issue if I had to guess. The only clue I have is that when it is powered on the CPU led flashes on and off, then the DRAM led flashes on and off, but then nothing else does. The monitor and HDMI cable I use are both fine.
part list: https://uk.pcpartpicker.com/user/benll12/saved/jdJvZL