If you are looking and having trouble finding where to put a jumper if the touchscreen pin connector is already gone or lifted due to water water damaged on Nokia C7-00. This solution might help you to ease out your hard time finding where to solder a jumper wire on it just to fix a touchscreen not working problem.

This solution exactly shows the connection line paths of the touchscreen pin connector of the Nokia C7-00 PCB board layout. You may only need to check its corresponding pinouts if the connection were already cut-off or have an open circuit, then solder a jumper on it, for it is only the options. 
nokia c7 touchscreen pin jumper ways solution by Gsmangel
Nokia C7-00 Touchscreen Pin Connector Jumper Solution
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Jut also check out all the corresponding components where the particular pins is connected for it will also cause the problem if already damaged or corroded. The two coils are for the touchscreen supply voltages 1.8V and 2.8V , the corresponding resistors are for the touch screen data signal filters which has a rated value of 100ohms each. So, that's it and hope this helps to you on fixing Nokia C7-00 touchscreen problem.

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