Hi,
I am just new on this forum, I just built a desktop from scratch but when I turn the power button it turns on for a few seconds then turns off. I disconnected all the hardware, cpu, ram, ssd, hard drive and only the motherboard itself connected to power supply and power button and power led from the case also connected also the same issue turns on then off. I was thinking that maybe it is the Power supply that is having a problem so I borrowed a power supply from my son's desktop, but still giving the same problem. So, I came up to a conclusion that it is a motherboard problem. Any help would be greatly appreciated. Thanks