SAMSUNG Proprietary-Contents may change without noticeThis Document can not be used without Samsung's authorizationFlow Chart of Troubleshooting9-99-5. Microphone PartUCP200 pin U18 ="H"at Mic Active ?Check MIC ConnectionResolder or Replave UCP200Resolder L405, L407, L408, L409, C431, C433,C434, C435, C436, C437 and R409, R410ENDNoYesYesYesYesNoCheck the MICNoReplace the MICMicrophone does not work