So, the first time I started the game I set the brightness setting to four. I could see the symbol to the left. Later, I wanted to adjust it, but I can no longer see the symbol no matter what I set the brightness setting to. I didn't change any setting on the TV or on my PS4 Pro in the interim. (I'm using an LG 4k OLED tv, if that makes any difference.) What's wrong? And how do I fix it?