Touch screen panel is something that can be damaged easily for any touch screen mobile phone. Replacing the Nokia Lumia 510 touch screen panel with a new one can solve this problem easily.
If touch is still not working even after replacing it then your touch screen connector may be damaged. This can happen because of any number of reasons, for example roughly connecting or disconnecting the touch panel’s flex cable to the connector or if it gets rusty because of moisture.
If this is the case then you have to replace the touch panel connector with a new one. I have marked it on the diagram below.
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Here is Nokia Lumia 510 touch panel connector. Please study these diagrams very carefully before you start repairing.
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Note: Every repairing solution posted here is tested by at least one member of our team. Use the information available here at Your Own Risk. We are not responsible if any harm comes to your device during the repairing process.