Samsung E2121b mic not working solution by jumpering, Samsung E2121b mic ways jumpers.           
Solution: First try to change mic with new one.if problem not solved then try to trace missing mic points with multi meter.The diagram below is solution for Samsung E2121b mic problem.Check all points as shown in diagram below and make jumpers like diagram.
Samsung E2121b Mic Ways

Samsung e2121b Mic Jumper Solution

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