Wondering how to fix screen going dark on PS5? This is how you do it:
PS5 Settings > Screen and Video > Screen > Dim Screen While Inactive > Don’t Dim
You can also set it to 5/15/30 Minutes. This is a power saving setting meant to save you power when the console hasn’t been used for a while. In many cases, such as when watching movies or not pressing any buttons for a while, this can become bothersome so it’s helpful to turn it off.