Desktop PC won't tu on, have to hold down Case's power key while flipping PSU's power key to tu it on

Ok, here it goes. Assembled a computer about a month ago. Asus HERO, GTX 970, 1TB, i7 6700K, 1250W XFX Gold. About a week after, it wouldn't start. The lights on the Main were lit, but the system just wouldn't power up. So i flipped the PSU's switch a few times, while holding the power key of my case, and it tued on. Continued to do this for a bout two weeks, till yesterday. No matter how many times i flipped the PSU's switch, the PC wouldn't power up. So i opened up the PSU, and found a bad capacitor. Replaced it, and tried again. Still no luck. Wouldn't power up normally by just pressing the Power key once, had to hold the power while flipping the PSU's switch to power the damn thing on. Do you guys think this is a PSU problem, or a MB problem ? After the PC powers up, it runs like it's supposed to, even under heavy load. So i " think " the MB is probably fine. On the other hand, there was no other visible damage inside the PSU other than that one Capacitor which i replaced. What do you guys think ?

Recent Questions...