Why does my monitor have a purple-ish tint and freezing?
So I have a 23 inch AOC monitor whic I bought from gumtree not long ago. The owner didn't know about the issue so he refunded me and let me keep the screen. Now I just want to fix it so I can use it. It has a purple-ish tint and it freezes like every 5 seconds. The top part of the screen doesn't freeze. When the screen freezes, the pixels become a lot more visible than before. What could the issue be?
Edit: I think the model is AOC i2367f 23"
I have just opened the monitor and before I did my monitor worked fine for 5 minutes, then it just started freezing and had the purple tint again. I have opened it and stuff seems normal. I tried disconnecting the speaker (it was just in the way and I don't use it) and the display cable to clean it. Didn't work.
Any help is appreciated