Sleep mode being odd.

In short when I put my computer to sleep mode. At first it does it well, fans turn off, screen goes sleep mode. As intended it's in it quiet standby mode.


But here comes the issue. Few second after entering the sleep mode. The fans start working again, but screen is still in sleep mode. I can wake up computer.. but I'm forced to shutdown PC because sleep mode is not working properly.

I would love to have quiet standby/sleep mode.

Question is how to fix the issue to have pc in it's quiet sleep mode?