I came to my desk one day and found my PC completely off. It won’t turn back on. I’ve swapped out the case and the power supply already. The motherboard was sent in for warranty, and they verified it works just fine. I built this PC myself, and it ran well for six months before it suddenly stopped working. I’ve checked all the connections, confirmed the power switches are correctly set, and even tried shorting the front panel. When I toggle the switch on my power supply unit, my speakers light up and indicate USB Mode, which suggests the motherboard is receiving power. So, what could be causing my computer not to turn on? I could really use some help!
3 Answers
Hey! Just to get a clearer picture, can you share your build specs? Knowing the exact components can help! For example, the motherboard is crucial for diagnosing power issues. If things still don’t work after checking everything, you might need to really consider your motherboard or CPU again. What’ve you got?
Sounds like a gremlin in the works! You’ve got solid specs, but sometimes components can act up. If you’re confident in your connections, I’d suggest borrowing a PSU to test if yours might be faulty, even if it seems fine. You never know!
Seriously, gremlins are the worst! Testing with another PSU could definitely help eliminate that as an issue.
With the details you’ve provided, it’s tough to pinpoint the issue since many things could be causing this problem. It might be worth checking if the motherboard is correctly seated or if there might be a short somewhere. Did you do a thorough check of the power connections and cables? Sometimes it’s the small things that trip us up!
I can totally relate! It’s always something sneaky that gets overlooked. If you’ve checked everything, maybe consider reseating the RAM or testing each stick individually.
PLATFORM INFORMATION

Sure! Here are my specs: Phanteks XT Pro case, Gigabyte B550 Aorus Elite AX V2 motherboard, Ryzen 7 5800X CPU, with 4x Corsair Vengeance 16GB RAM, a 4TB Samsung SSD, and a Gigabyte Radeon RX 7800 XT GPU. I had originally been using the same motherboard and CPU with fewer RAM sticks before the issue started.