Replaced LCD, Screen too dark

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http://androidforums.com – I just replaced my LCD screen with an eBay replacement and followed a youtube video to install. Everything went back together well, but now the screen is so dark, I can barely see anything. I checked and I DO have the little rubber piece over the proximity sensor and have tried multiple times to make sure that it is in good alignment. I could still have it off-center I suppose, but I've tried. Adjusting brightness settings does nothing. Please help! (General)