in first step wash all these parts with any electronics cleaner and then leave it to dry for a few mint.then check this track and ways with a electronics meter and if any link of them is broken make these jumpers as given in diagram attached with this post.all links are given in red and blue color.so that can be identified easily.
for more detail and new tips and tricks about this problem keep visiting this page we will update it timely with new diagrams.some related post are also given bellow you can read them also for more information.
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