Display Too Dark

I'm on a MacBook Pro late 2013 running OS 10.15. For some time now the display has been very dark, making it impossible to watch most movies, etc. Things like YouTube vids are usually okay but movies on Netflix, e.g. are just too dark to watch. I have brightness on full and I've diddled around with the display profile but nothing helps.

I've just compared the same movie scene on my MacBook and on my iPad and the difference is night and day (no pun intended). Is there anything I can...

Display Too Dark

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