PC develops a dark screen within seconds of startup.
PC develops a dark screen within seconds of startup.
Hi everyone -- I just assembled my computer using an old power supply and SSD, with all other components replaced. It boots into the BIOS but then shuts down after about 10 seconds (sometimes it's 2 seconds or 50 seconds). The CPU light turns red, and occasionally it shows "VGA" too. I'm not sure which part is faulty. My specs are: Ryzen 7900X CPU, Gigabyte B650 Gaming X AX (rev 1.1), Kingston FURY Beast DDR5-6000 RAM (2x16GB), RTX 4080 GPU, and Corsair HX1000i 1000W PSU. I suspect the CPU or motherboard might be damaged, but I'm not sure which one. I've tried clearing the CMOS a few times, which sometimes helps keep the BIOS running longer, but it eventually fails. I haven't experienced a black screen beyond 2 minutes yet. The cooler is a Noctua D15, and the BIOS reports a CPU temperature of 36°C, so cooling seems adequate. Thanks for any advice!