Question Gaming PC randomly turns off, please help.

[gordonmousedeer]

WhatsApp conversation of the issue

The gaming PC I built for my client has a problem. As seen in the screenshot of the WhatsApp message above, the gaming PC randomly turns off. My client has to force shutdown and turn on the main electricity supply to be able to turn on the PC again. Changing the HDMI cable didn't make things better. If anything appears on screen at all, it shows that the PC is booting. The PC was fine for about three months.
Specs (as seen in video below)

View: https://www.youtube.com/watch?v=T7SlkpFcdls

AMD Ryzen 3 3200G (CPU, was new)
Nvidia GeForce GTX 650 (Zotac model, was used/refurbished)
8 GB Apacer 2666 MHz DDR4 RAM (memory, was new)
MSI A320M-A PRO MAX (mobo, was new)
120 GB ADATA SU650 (SATA SSD, was new)
AVF APS R500 500 W (PSU was new)
Abkoncore Xtreme MX (case, was new)

 

[Nemesia]

Could be the horrible PSU or the 8 years old GTX 650.

If the system shutdown or restart on it's own it's normally overheating, psu related.

 

[gordonmousedeer]

Thank you for the reply. However, my client didn't report this issue anymore. I think he uninstalled one of those Windows updates. Perhaps it was a software issue?