Problem with occasional power restoration.
Problem with occasional power restoration.
Seeking advice on a system that's been stable for over 18 months but now shows intermittent power issues. The mainboard indicators and fans spin briefly when powered, but it fails to boot after turning on. After resetting the PSU and trying again, it works normally. No problems during operation despite attempts. All connections and components checked, including testing on another machine. Possible cause might be the PSU itself.
Seems similar to what happened with your PSU a few years back: the 12V rail was defective. You can purchase an affordable PSU tester and connect the cables to it, then power it on. For your old unit, it would begin at around 11.8V and gradually drop due to a likely bad or poorly soldered capacitor. You might attempt to use the HWinfo feature once it starts up to get an estimate, though accuracy isn't guaranteed. Avoid connecting GPU power cables to other devices—use a separate one for each 8-pin connector. Ensure your PSU can handle the initial surge needed by the 3090 graphics card. If you have a pet, use a flashlight to inspect for overheating caused by fur buildup.