System failure detected. Please check connections and power source.
System failure detected. Please check connections and power source.
Hi everyone, I'm working on reviving an older PC and have encountered a booting problem despite replacing all components. I've reviewed the issue online but haven't found a clear cause. After connecting everything correctly and trying to power it on, the motherboard shows its LED on the back, suggesting power is reaching it. However, when I press the power button, it briefly lights up then shuts off completely, and nothing boots. I noticed my PSU only has a 4-pin connector while the motherboard uses an 8-pin slot. After searching, it seems the system should still run if the motherboard doesn't need excessive power. Any suggestions or tips would be really helpful. Thanks!
The power supply unit you're using is the one that stopped working when the Power Good signal dropped below expectations, and switching to a new one fixed the problem. I own a budget-friendly PSU tester that provides reliable voltage readings along with the Power Good signal.