Nokia 5250 Key Pad Lock is Not Working

keypad lock is used for security reasons in nokia 5250.if it is not working in phone you ill not be able to use phone keys.it can be due to water damage carbon or rust.so if you have keypad problem in nokia 5250 look at diagram bellow and check these parts.


in above diagram you can see green and red lines these are tracks of keypad lock button.green color point is indicating ground prints while red is a positive point.you can check these points and parts if track is missing apply jumpers as shown in above diagram.if track is ok then replace keypad lock button to solve this issue in nokia 5250.
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