Question Pc boots up normally, then no more display/peripherals (at random times)

[TrisHasProblems]

As the title say, it's quite weird. Whenever I leave my PC off for a long period of time (overnight for example), when I try to turn it back on, it'll start up as it should, booting and going through the mobo's splash screen, but then at some point after this, sometimes soon after, sometimes once it's on windows, the display, and everything else outside of the PC will turn off (No light, nothing).

Monitor: Samsung S27B350
GPU: Radeon RX5600 XT
CPU: Ryzen 7 2700X
Ram: 2x8GB DDR4
Motherboard: Gigabyte D450M DS3H
PSU: Cerberus S5650 W 805 Bronze

 

[Shjacks55]

Battery management> turn off sleep after x minutes.