Solutions.
First check polarity mising key on pcb key pad touch in dondition of no polarity of check meter then conform that key pad ic if its broken or missing try to remove key pad ic first replace with new if new key pad ic not available or broken links on pcb then make these jumpers cearfully and do not short with nearest key.these jumper can makes with smd reworkstation soldring iron.these jumper are so closest and you need to care for missing or shorting jumpers wire.please be cearfull.
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