59Audio boardThe audio board that came with your computer should look like thefigure that follows.Note: The system has two microphone-in jacks (front and rear).However, you can not use both of them at the same time. Bydefault, your system enables the microphone-in jack in front anddisables the one at the back.Label DescriptionCN1 USB 1.1 connectorCN2 andCN3USB portsCN4 Standard Audio connector - connects to the CN16 of themainboardCN5 USB connector - connects to the CN3 connector of themainboardJK1 Microphone-in jack (front) see noteJK2 Audio-out portJP1 Audio connector