I have a made a game for the Xbox 360 using XNA and whilst testing the game the screen seems to dim every 30 seconds. The way it dims is as if I have been away from the Xbox for a while. If I press the Xbox guide it goes back to normal. I've tried googling this issue and i've found a few people who have had the same problem but I couldn't seem to find any replies on those posts. If anyone knows what the issue is and how I could fix it it would be of great help as this is the last kink i'm trying to resolve with my game.
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1It's not a dynamic contrast or power saving feature of your TV, is it? – Andrew Russell Jun 28 '13 at 05:03
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1Try some other game or application and see if the same happens with them. – user1306322 Jun 28 '13 at 06:08
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@AndrewRussell I changed my background to cornflowerblue instead of black and it seems it didn't dim so I think your assumption was right it is something to do with my TV and not the game. Thanks for the help! By the way, I love your work Andrew; i'm going to use ExEn to port my game to other platforms. – LionSword Jun 28 '13 at 18:42
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Just to convert my comment into an answer:
Many modern TVs and some monitors have a "dynamic contrast" feature where, if the displayed image is predominantly black, the intensity of the backlight will be reduced.
(Often it's really annoying, just making high-contrast black-background scenes go dark for no reason.)
The backlight can also be turned down as a power-saving feature, kind of like a screen-saver.
You could test on a monitor without this feature, disable this feature in your TV settings, or use a scene that isn't so dark.

Andrew Russell
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