Microphone, What should i do if my microphone does not work, How can i prevent microphone feedback – Sony VGN-FZ200 User Manual

VGN-FZ290EGE, VGN-FZ240N, VGN-FZ220E, VGN-FZ230E, VGN-FZ285U, VGN-FZ290N, VGN-FZ210CE, VGN-FZ250E, VGN-FZ290, VGN-FZ283BN, VGN-FZ290E, VGN-FZ290U, VGN-FZ260E, VGN-FZ280E, VGN-FZ290EGC, VGN-FZ220U, VGN-FZ240E, VGN-FZ290EGB, VGN-FZ290EGS