Yep its true, the Gameboy Advance has a secret contrast control hidden under the sticker on its rear. EAGB have the full instructions on how to adjust it. !!! WARNING: Pixelised does not condone making this adjustment and doing so may well invalidate your warranty so dont come crying back to us when you break your shiny new GBA...!!!
Update: It's been confirmed, fiddling with this will permanently damage your GBA. We repeat, do not try this at home.
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