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by (Genius) (10.4m points)
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This then may be a defect GPU chip or LCD (the screen). When you power it, does the power on SINOTEC logo appear affected by the issue in question? Please login with 'Guest' and 'Password' to comment under this question as we continue to help. Click 'comment' below, then click 'Login' and then enter: Guest as your username and Password as your password. Then kindly reply to my question and we will assist further.

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