Mimoo pc troubleshooting

Totally forgot but I plan to log the big problem with MImoo's pc.

tldr; ATX power on the mobo is bad, disconnects.

update: turns out new mobo worked with some quick tugs on atx power, no issue. 2ish months later, it happens again! must be cable i guess.

update2: confirmed. it WAS the cable ): the mobo is already replaced but it did have a bad pwm fan header (DC control only). I can't test the ATX until I get another ryzen cpu to test it.