Nothing is turning on.
Nothing is turning on.
Your PC isn’t starting at all, no motherboard indicators are visible. It seemed to power on briefly during use before shutting down abruptly—no issue with the power button or physical damage. After trying a PSU replacement, things remain unresponsive. When you connect your phone (even though the PC appears inactive), it starts charging quickly, suggesting some power is reaching the board. This could mean a minor issue with the charging circuit or a failing motherboard component. The fan isn’t spinning either, which makes it hard to rule out overheating problems. Since you can’t locate the motherboard model and don’t see any visible faults, consider checking for signs of corrosion, loose connections, or a faulty voltage regulator. If possible, try booting into safe mode or using a different USB port to confirm if the problem is isolated to the charging setup.
You've already replaced the power supply and made no changes, so it's unlikely that's the problem. Allowing some power to flow through the motherboard even when it's off is typical for features like wake-on-lan. Motherboard models are generally printed on them. If you can't locate it, it might be obstructed by the cooler or another part. You could share a photo for better insight. A common method to verify PSU functionality is connecting pins 16 and 17 together with a metal object such as a paperclip, which activates the power supply fully. This involves the pin layout from the large 24-pin connector; pay attention to the orientation tab. Assuming that's not the issue, the next step would likely be resetting the CMOS settings. If this doesn't resolve it, the problem probably lies with your motherboard, CPU, or RAM.
I located the motherboard model, which was concealed behind the GPU. It's a Gigabyte B460M DS3H AC. My GPU is an RTX 2060 and my RAM is TEAMGROUP T-Force Vulcan Z with 32 GB (two 16 GB modules) DDR4-3600 CL18 memory. The CPU is an Intel Core i7-10700F at 2.9 GHz with 8 cores. I have two Apevia Prestige 600 W power supplies, both certified 80+ Gold for ATX use. To test the PSU, I need to remove it entirely from the PC. This process took me four hours because I’m not very experienced.
If you've already swapped out the PSU, that's out of the question. Remove all components from the motherboard except the CPU, cooler, fan, and power connectors. Attempt to boot using a screwdriver to short the power pins. If nothing works, it’s likely the motherboard itself. A faulty CPU is probable if it still doesn’t start.
The CMOS issue was unknown to me, honestly. Writing this on my PC after two weeks off feels good. Plus, my motherboard has a way to reset the CMOS using a screwdriver—lucky thing since I don’t have a paperclip at home.
I wasn't aware of CMOS before you talked about it. After you mentioned it, I looked it up myself. Thanks again!