How to fix Table display malfunctioning?

I have UNI N1 Tablet, when I was charging my tablet under switch off it will battery image on white background but now it shows only white page with some Horizontal lines

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After Switch on Tablet display shows black screen with some Horizontal lines

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I Try to go to boot options but I can't,

After that I think there is some loose contact in display device, so I ejact that and fix it,

There after also It doesn't work, what to do ? I want your help to fix this issue.

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