Screen does not light up!!!

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http://forums.androidcentral.com – Hey. One minute my phone was working fine. Then suddenly the screen went black and no matter what I do it does not come back on. The button home button key, back, button, etc all work and light up fine. When I charge the phone the LED indicator works fine too. Aside from the screen not working, everything else works- including start up sounds. I moved to another country and can not get a replacement by ATT&T. Any ideas?? Thanks I have official samsung stores all around me though. Would they replace for me even though I don't have a receipt or warranty? I bought it off of Ebay a a (HowTos)