PC fails to start following unusual event.
PC fails to start following unusual event.
Current situation: After four hours, I restarted the machine. It powered back on, but the monitor displayed no signal at first, and both the CPU and DRAM debug LEDs remained active. I had to reset the CMOS to enter BIOS, likely because I removed the GPU. Background details: I use a basic UPS to guard against data loss due to frequent power interruptions in my area. Over the past three years, my motherboard's RGB lights would blink once or twice when I powered down the UPS after shutting down the PC. This morning, following a power outage, I hibernated Windows and turned off the UPS. The RGB lights then began flashing irregularly—different LEDs, colors, about once every three seconds—for five minutes. This occurred even after I completely disconnected the PC from the UPS (the cable was removed). I saw a similar incident in a video at https://imgur.com/FVq9uj8. How could this happen when there was no power supply at all? I tried pressing the power button to discharge any residual charge, but it didn’t stop the LEDs. They ceased only when power was restored and I connected the PC to a wall outlet. Now, the machine refuses to turn on, whether plugged into the UPS or directly on a wall socket. The UPS is functioning correctly, so it shouldn’t be the issue. I attempted to power it on, but no fans, lights, or any output appeared. I recently installed a new RTX 3060 GPU 10 days ago, which was working properly before. Removing it didn’t resolve the problem. Specifics: I have an Asrock B550M steel legend Ryzen 5700G processor (no PBO, running at 3.9GHz max), two 8GB DDR4 modules at 2600 MHz, and a RTX 3060 Corsair RM650 PSU. I’m unsure why this occurred and hope someone can explain it. Also, I don’t use the machine for gaming. This isn’t a joke or a prank. Thanks.
Capacitors retain hidden energy Your UPS could fail and might have damaged the PSU. Which model is it? Have you attempted to reset the CMOS? Could you remove the PSU and attempt a jumpstart to see if it can power on? https://help.corsair.com/hc/en-us/articl...upply-Unit I suggest against doing this. Use the Windows shutdown option. Hibernation assumes power will stay on.
Thanks for the update. As you said, the computer is working normally now. Both the UPS and power supply unit are functioning properly. I can launch Windows without any issues. However, the events leading up to that are still unclear to me. Also, I noticed that hibernation saves the system state to the disk without needing power.
Hibernation demands energy, it's essentially an advanced form of sleep. It consumes less power while still needing it. Forcing your UPS off after putting your computer into hibernate is leading to incorrect shutdowns each time. UPS units are built for constant operation, they don't require manual deactivation once your computer is done. The best advice I can give is to stop shutting down the UPS and opt for Shutdown instead. Since you've been using hibernate incorrectly, you're already ending up shutting it down improperly. If you need persistence across sessions, keep your UPS and power supply active, switch to hibernate, and leave them on.
Thank you for your clarification. Based on what you shared, it seems more like the system enters sleep mode rather than true hibernation. I understand now that power isn't completely cut off during hibernation, and the behavior you described aligns better with how sleep mode functions.
Back then, when they introduced W10, shutdown mimicked many features of hibernate. In reality, the best way to completely power down a machine is by using the Restart option. I strongly recommend avoiding turning off the UPS, as it should remain active during even long interruptions.
You're welcome to investigate further if you wish. I might be mistaken because I don't rely on Hibernate, which has several known problems. I lack extensive hands-on experience, but the information I gathered yesterday from guides and forums was consistent—current Hibernate versions for Windows 10 and 11 need power. Still, that doesn't diminish the key point about turning off your UPS once you're done. That seems to be the main lesson in both scenarios.