I built my PC about a year ago, and it was running perfectly until last night. I was playing Arc Raiders and suddenly lost the video signal. The PC powers on fine with all fans and lights working, including the PSU and GPU, but I can't get any picture on the screen.
Here are my specs:
* ASRock B650I Lightning WiFi AMD AM5 Mini-ITX Motherboard
* ASUS Tuf 4090 GPU
* AMD Ryzen 7 7800X3D CPU
* G.SKILL Trident Z5 Neo 32GB RAM (2x16)
* NZXT Kraken 240 AIO Liquid Cooler
I've tried several fixes, including using different HDMI and DisplayPort cables, testing multiple monitors, and connecting the HDMI to the motherboard with and without the GPU. I also swapped RAM sticks and slots, reset the CMOS, and reconnected everything. Despite these efforts, nothing seems to work. Any suggestions would be greatly appreciated!
2 Answers
It sounds like there could be a chance your motherboard might be failing. One thing you could check is the debug lights on the motherboard. They can give you a clue about what might be going wrong. Also, have you thought about trying your components on a different motherboard to rule that out?
Could it possibly be a faulty power supply? Sometimes they can show power to fans but not deliver enough to the components. It might be worth checking.

Thanks for the suggestion! I'm using an NZXT Kraken 240 for cooling, and unfortunately, I don’t have another motherboard to test things.