yeah, i had the same problems. if i twisted it right, it would charge. but then, it just started to do the "really bright orange", and wasn't charging at all. i found a DC-in board on ebay for about $20, and followed instructions on pbfixit.com to install it. took some time to disassemble, but if you're comfortable with doing it, it's not that bad. just keep track of screws and follow the directions.
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