Sudden Change in Brightness/Contrast/Gamma

My System:

     Graphics Card: PowerColor Red Devil Radeon RX480 8GB DDR5

     Custom Desktop System

     Operating System: Windows 10 Pro 64bit

     Driver Version: Radeon Software Crimson Edition ReLive 17.5.2

     Display Device: Samsung SMS23A550H 1920x1080 @60Hz HDMI

     Motherbord: ASUS Sabertooth Z77

     CPU: Intel Core i7 2600

     Power Supply Unit: beQuiet Dark Power Pro 650W (already a few years old, never had any problems with it)

     RAM: 16GB DDR3



a couple of days ago I started up my Computer and after a few minutes of harmless browsing my screen went black, it didn't say it lost the video feed it was just black, then came back and somehow something changed in the brightness, contrast and/or gamma settings. After a few more seconds the screen went black again and then didn't come back so I figured I restart the screen and after doing so it was green, like a solid green screen. I checked if the cable was connected properly and it was, took it out and plugged it back in again which fixed nothing.

I haven't had anything like that ever before or after again and that isn't why I am writing this post exactly.

My problem is that the somehow changed brightness/contrast/gamma issue persists which is driving me crazy. I managed to somehow fix it by adjusting the gamma value in the windows settings but something seems to be wrong with te contrast as well as I can see some brighter areas on my desktop background which shouldn't be visible.

I uploaded some pictures to illustrate what I mean, I hope they help.

Now you might ask how I got the 'less_broken' images. I thought I fixed the issue to the best of my ability and was actually fine with it when I started playing the Dark Souls 3 DLCs and after closing the game noticed that once again something was off with my settings. As it turns out Dark Souls seeems to almost perfectly revert my settings back to their original state, almost, see the 'less_broken' images. Sadly I wanted to change back the gamma adjustment I made beacause with the reverted settings it made the screen a lot darker than it should be but as I went back into the Windows brighness/contrast/gamma settings it reset again so saldy the Dark Souls fix isn't permanent.

I also spend a lot of time fiddling with the settings on my monitor which sadly didn't do anything.


Sorry for that lengthy explanation. I hope somebody can help me figure out what happened and how I can fix my Brightness/contrast/gamma (not sure which of those are actually affected).