The motherboard isn't powering on the PSU, and the front panel connectors aren't the problem.
The motherboard isn't powering on the PSU, and the front panel connectors aren't the problem.
I understand what you're trying to do, but I doubt you'll get the outcome you hope for. It seems the motherboards will work hard to keep systems safe from starting in an unusable condition. From your photos it looks like the PSU is supplying power to the motherboard, so you might want to focus on setting up a stable post. Trying to simplify everything could be helpful, but I think you might have eliminated too many factors at once.
I’ve been checking for nearly a week, and I didn’t jump right into this setup. I only tried this after a few days of testing to find out what cables or connections were missing. The motherboard keeps getting some power, but it doesn’t start the PSU properly—I don’t know how to describe that issue. The PSU fans won’t turn on either.
Just put it straight—don’t try to force it. You need everything else in place.
You shared your experience with the friend’s PSU and how it was connected to the system. It wasn’t tested with all components, so results might not be fully reliable. Regarding compatibility, it’s unclear if your PSU works with theirs—possibly due to a case swap issue. The fan seems affected, which isn’t a strong sign of a motherboard problem. You mentioned concerns about the MOBO, but you said only a case swap was done; did any other parts get swapped?
Connected GPU, a few RAM modules, and the cooling system are all functional. The power supply unit is still failing to activate.