PC will not boot

Jan 20, 2019
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Hello, I woke up this morning and noticed my PC was off and i thought that was weird because I never turned it off. I went and tried to boot it and noting happened. I did some testing like taking out the RAM, unplugging the SSD and HDDs and taking out the graphics card and nothing works. i have tried clearing the CMOS many times still nothing works. The only thing that happens is when I plug in the PSU cable to the computer, the motherboard power light flashes every so often, it isnt constant. Could this be a fried PSU?