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I m using a t6963c based 128*64 powertip lcd.My all connections as well as software are correct.But I am not getting displayed anything.Only thing I am getting is a single line upon reset.I read from internet and tried to increased contrast votage.But it resulted into displaying of all black dots on the scrren and still result was same nothing was displayed on the screen.Plz some one help wha is actually the problem.My present contrast voltage is -4V