Acer V50LA User Manual page 18

1.8.1 Audio-I/O Board Features
The audio-I/O board consists of microphone port, line-in port, line-out
port, and MIDI/game port. These ports accommodate the external
audio devices.
The system board supports two types of audio-I/O board. Figures
1-12 and 1-13 show the different audio-I/O boards that may come with
the system.
Microphone Port
Line-in Port
Line-out Port
MIDI/Game Port
Figure 1-12 Audio-I/O Board Without Internal Connectors
1-18 User's Guide