it is no doubt the first transistor in the audio you can replace it or use an external amp from output although the sound quality would be greatly diminished i would say replace the transistor in the audio to find that look where your volume connects to your circuit board see the # with an r in front of it that is the resistor for the audio the numbers are the same for all the audio the letter will change to a Q for the part you are looking for find the first q number and chances are that is what is blown and needs replaced i have not opened mine so i dont even know if the mic is a stereo or a mono input i guess ill open mine now good luck with yours
davidneumann2001atyahoocom
July 2011