Shut down randomly and display a red CPU debug light.
Shut down randomly and display a red CPU debug light.
I was casually scrolling through YouTube when my PC suddenly stopped working, then restarted itself and displayed a red CPU debug light on the motherboard. Whenever I power it back on, the fans spin but the red CPU light stays on for 1-2 seconds before the system powers down with the CPU light flashing red just before shutdown. I’ve tried reseating RAM, CPU, GPU, clearing CMOS, and checking cables. Plugging in a bare minimum setup didn’t help. The only thing preventing shutdown is the CPU cable on the motherboard. Once that’s connected, the computer keeps shutting down and restarting. My specs are Ryzen 5 5600 GTX, 1660, 16GB RAM, 500GB NVMe SSD, Max M. Boards, all updated drivers. I’m unsure why it keeps failing despite everything. Thanks for any advice. IMG_0461.mov
Thank you for your message! Just to clarify, your PSU has only one CPU power port, and the other options were limited. That’s likely why you had to use the available cable—it was probably my best chance, though it’s not ideal. Things can be unpredictable with these components.
Are there any POST codes like beep codes besides the CPU debug light? The CPU debug light indicates a problem with your CPU, possibly related to power delivery or the CPU socket. A simple test is to use the cheapest CPU compatible with your motherboard and BIOS and attempt to boot it.
Typically after a POST failure, the system stops checking other components. I’m not 100% certain about the exact order, but it usually begins with the motherboard, then the CPU, followed by RAM, and finally the GPU. It makes sense that if the CPU check fails, the process halts before moving on to RAM or other parts.
I understand - this means the board is attempting to power on the CPU but isn't functioning correctly, which keeps the CPU indicator lit. It would help if you could look for an affordable CPU or borrow one that can either confirm or eliminate a faulty unit based on your symptoms. Is this a recent purchase or something you've owned for a while? Another point: were you running the system at its default settings or did you perform an overclock? Now, I have to mention: the photo appears to show a lower-quality (all-aluminum) CPU cooler installed, one that likely won't provide adequate cooling for your current CPU. If it turns out to be defective, the next step would be to figure out why it failed and, from the system image, I doubt the cooler is handling the heat from a 5600 chip effectively.
I’ve been working on this build for about two years now. It started with the stock AMD cooler that usually comes with CPUs, which was replaced five days ago. I’m planning to bring the CPU and GPU to a repair shop to test them and see if they fit their systems. This should help me figure out whether the problem lies with the motherboard or power supply unit. I think it’ll be simpler than trying to fix things here right now. I never overclock my system or change RAM speed since I don’t use heavy applications, so I don’t see any need to do that.
So you swapped the cooler earlier than the issue began. If you did, what model were you using before and why did you choose it? I’d recommend a Wraith style unit with heatpipes, especially since you’re comfortable with the different stock options. The one shown in your photo seems like a basic aluminum CPU cooler, which isn’t ideal for high-performance chips like the 5600. Remember, the CPU depends on cool air inside the case—it draws from there directly. If the air is already warm, the chip gets hotter. If the cooler can’t handle it, things will go wrong. From what I’ve noticed, it looks like the CPU was already getting warmer before the system failed—just got too hot for too long and stopped working.
Before it was the same cooler, so I chose to purchase the same one because it had worked well for a while. After replacing it, the CPU appeared fine—no bent pins or unusual marks on the back. But I understand what you mean about coolers! I’m currently traveling to check the CPU and see if the cooler caused any issues. I’m thinking of upgrading to a new case soon, and I was considering a 240mm water cooler CPU cooler, but I’ve never tried one before, so I’ve stuck with regular fans. Now I just need to compare options and find something that fits my system.