Question PC suddenly goes into black screen (the red light in the mouse also goes off)

May 15, 2020
Hi everyone, I am new to this forum and I would really like to solve a big and disruptive issue I am facing since I've built this new PC.
When it occurs I can see that the entire PC is still on (all the fans are on as usual and even the CPU's wraith fan has its lights on so it seems that the PC is on but the monitor, keyboard and mouse are suddenly turned off!).

I checked in my Event Viewer and all I see is a "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly", and that seems understandable as I hardly turned off the PC after it went out of response...
My PC is completely new and I've also done a RAM test and it went OK without any problem.
My PC's specs:
-AMD Ryzen 2700x
-8GBx2 3200Hz Ram
-Asus RX580 4GB
-Corsair TX650M
-1TB WD (I am planning to buy a SSD as soon as possible)

As a clarification this problem is completely random and sometimes it doesn't happen for a entire week..
Thanks in advance!
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