And it's either real or not at all?
And it's either real or not at all?
Two months ago, I assembled an AM5 PC with a NZXT B650E motherboard, 7950X3D chipset, 128 GB DDR5 RAM, and a 4090 motherboard. It functioned perfectly. I completed all tests and maintained it well. Recently, after a short break, the system failed to boot—pressing power on/off didn’t produce any response. I’m struggling and need assistance.
When nothing occurs, as with no LEDs and so on, it's probably just a power or power button problem rather than something completely wrong. Supply from the wall, wall power cable, and switch on the PSU header are checked. The motherboard has an onboard power button at the bottom right, so that's worth trying. After confirming all factors, remove the RTX 4090 and attempt booting with the integrated graphics. If that fails, strip down to just one RAM stick (likely slot 2) and verify with the manual. It seems slot 2 and 4 are relevant, but slot 2 is typically the main one for troubleshooting.
Thanks for the help! There seems to be energy coming from the wall. How can I verify the power cable? I was warned against mixing cables from different PSU brands, but the switch is working. I pressed the motherboard boot button and still got nothing—maybe the case or connection is the issue. Tested RAM and GPU, but nothing changed.
The ATX AC power cable is a common component. Changing power supply cables between brands or models isn't usually advisable, but swapping the DC side is. The AC cable simply connects two pins and a ground; it rarely fails unless you exceed its rating—such as using a cable not rated for 10A when drawing near that limit. Make sure the connectors are securely seated. Otherwise, you might need to take apart the system. Most computer issues aren’t major unless power isn’t reaching devices properly. You can test the PSU by disconnecting all modular cables except the 24-pin, then connecting pins 4 and 5 together with a paperclip or twist tie while removing the plastic. The power button acts as a brief contact, closing a circuit to keep those pins in contact and power on. The signal shows if the fan starts. If you pass the test, isolate further—starting with the lowest components like CPU, motherboard, PSU, and RAM. A shorted fan is a common cause of this kind of problem; disconnecting everything except what’s essential usually resolves it.