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Hello guys, half side of my iphone 5 touchscreen doesnt work and it has lines all over the screen do you have any idea what to do? left side not working please help me if u can , thx

You need to replace the display panel (LCD/Glass). There are a lot of shops that do phone repair. Just do a Google search for iPhone repair in your city.

You more than likley have a faulty digitizer. A screen replacement should fix it.