The PC isn't turning on and the problem appears to involve the 24-pin connector.
The PC isn't turning on and the problem appears to involve the 24-pin connector.
I assembled everything myself and tried to get it working. I thought there might be no power supply issue, so I checked the CPU and followed the instructions from that video. After testing the power source, everything started up normally until I removed a paperclip and connected the 24-pin connector. Once plugged in and pressed the power button, nothing happened. I'm using the NZXT H9 Flow and the front panel connectors are combined into one unit, which fits snugly. It seems like the problem might be elsewhere. If you have my parts list here: https://pcpartpicker.com/list/db8N6D, it would help. Also, I only have two RAM sticks installed; I read that using all four isn't recommended and I plan to return the extra ones. Thanks ahead!
I thought you might also tried connecting the paperclip or screwdriver to the power button pins on the motherboard just to confirm the power button works. You should also verify against the manual that the correct pins are used, as reading the board can be tricky. Also, make sure the 24-pin and CPU power connectors are fully inserted—especially the 14-pin, which often requires significant force and support to push it in properly.
I followed the manual to locate the pins to press, but no action occurred. I’m sure the connectors are completely inserted. I used the technique of bracing the back while pushing to avoid damaging the board.
It's not uncommon for a motherboard to fail immediately, but even getting the power supply to start doesn't guarantee it will run under stress. This often points toward an issue with the board itself. It's really annoying because you can't test it properly without having the right components on hand.