ASUS Prime X470-Pro No Power on

[meantomatoes]

Hi all,

Building my second PC with parts from Facebook, lo and behold the motherboard doesn't turn on. I initially thought 5VSB was missing but realized it's not because the RGBs work fine as soon as it's powered and actively change colors, but there's no response by shorting PWR_SW. Voltage at PWR_SW is ~3.3V. By shorting PSU power pins, components turn on but board does not POST. Clearly, there is an issue with the power circuit.

Does anyone have a boardview for this board? I've fixed MacBook boards but not PC boards. I don't have an oscilloscope to measure the RTC. One person on Badcaps with an X470 board repaired this problem by fixing cold joints on the RTC chip, but they look fine to me. Another person reported their board having a no-start condition after it's not had power, so I'm currently leaving it plugged in and seeing if it powers on in a couple hours. This chipset looks problematic in general. I should've known after my first PC not to buy ASUS boards. Physically, the board looks flawless. I'd appreciate some help!

[meantomatoes]

Update, found a Hz mode on my multimeter, the RTC crystal near the CPU and the one near the I/O header pins both read almost exactly 60 Hz. Puzzling.

[meantomatoes]

Turns out I had the CPU 90° the wrong way. The corner arrow is not obvious on this motherboard.

[Aliencomputres]

try google !