I've been building and fixing computers for about 25 years, and I'm really at my wits' end with a new setup. Recently, my computer died—specifically, the CPU from the 13000 series malfunctioned. Initially, I thought replacing it would solve the problem, so I upgraded to a Ryzen 9 9900x along with an RTX 5080 and an Asus Rog Strix X870-F motherboard. The only components I kept were a 1200w Asus PSU, three M.2 drives, two SATA drives, and the chassis, all of which are about three years old.
However, I'm still facing the same issue: when I power on the system, the RGB lights up, but there's no signal to the monitor and it won't POST. I've tried different monitor connections and cables, but nothing works. It's baffling because I thought upgrading these major parts would help. If anyone has suggestions, I'd appreciate it—I'm feeling a bit overwhelmed after spending seven hours on this without success. I plan to test the power source from a different outlet soon, but I'm also open to troubleshooting advice if I'm missing something obvious. Thanks!
5 Answers
It sounds like you've swapped many components already, but definitely double-check all connections and make sure everything is seated correctly. I’ve seen cases where just one loose cable can prevent booting. Also, if possible, verify that your components work in another system to rule out DOA parts.
Have you considered faulty RAM? It can cause similar booting issues. Try testing with one stick at a time to see if that makes a difference.
Another approach is to boot the motherboard outside of the case. You'll need to jump the power switch with a screwdriver. If it powers on outside, then something in the case may be shorting it out. If it still doesn't work outside, yeah, definitely look into the PSU again.
Have you tried replacing the PSU? That's often the culprit in these situations. Sometimes, even if the PSU is relatively new, it could still have issues. Or consider if the chassis might be causing a short circuit, which can happen sometimes. It could be worth troubleshooting those possibilities first.
Just a heads up, when troubleshooting these issues, systematically test each part. If it still doesn't boot, you might want to examine the outlet with a multimeter or plug into another outlet to ensure the power supply is consistent.
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