Mac Pro Turns Itself Off After A Few Minutes And Then It Won T Boot Mac Pro Late 2013

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I have a Mac Pro late 2013 and it started randomly shutting down by itself. When I try to turn it on again the back panel illuminates but the power button won’t. I tried resetting the smc, pram, but didn’t work. If I let the machine unplug for a few hours it will let me turn it on again, it boots and works fine for just a few minutes and turns itself off again. I don’t know if the CMOS Battery could be the cause. I appreciate your help!

Time for a new power supply: Mac Pro Late 2013 Power Supply Replacement