I just finished assembling my first PC from scratch, but I'm running into a problem: it won't POST. I've reseated the GPU three times and the RAM once, but when I power it on, I see a sequence of lights - red, then yellow, then white, and then it turns off. This cycle continues, but I'm getting no BIOS screen or video output at all. All the fans are spinning, and the LEDs are lit up.
Here are my specs:
- Case: Corsair 4000D Airflow
- CPU: Ryzen 9 7900x
- GPU: 9070xt Red Devil
- Storage: 2TB 990 PRO and 2TB 9100 PRO
- Memory: Corsair Vengeance 32GB DDR5
- Motherboard: ROG Strix x870-f Gaming Wifi
- CPU Cooler: Corsair icue Link Titan 360 RX RGB
- Power Supply: TT Premium Edition GF A3 80+ Gold
I would really appreciate any advice on what to try next since I've invested a lot into this build. I've heard about clearing the CMOS or updating the BIOS, but I'm not sure how that would help me in this situation.
2 Answers
First off, check if you're getting any beeps when you power on. If not, try removing the RAM and see if it beeps then. If there's still silence, make sure you connected the processor power cable properly. If everything seems connected, it might be worth testing your power supply to rule that out.
It sounds like a potential power issue. Double-check that your PSU has all the cables connected. Your graphics card should light up during boot, so if you see any colored lights on the backplate, let me know. As for updating the BIOS, you’ll need to download the latest version from your motherboard's support site using another computer, save it to a USB, and plug that into yours. But since you can’t POST, that’s a hurdle right now.
I had a similar issue! Take out the GPU and connect your display directly to the motherboard to see if that works.
Yeah, I checked around the CPU backplate area, but I'm still not getting anything. I reset the CMOS battery too, but it didn't help.