Acer 500L - Manual (Page 30)

2-6 AcerAltos 500L User’s Guide
Connector Function
CN16 Power switch
CN19 Housing fan connector
CN20 Audio line-in connector (reserved * )
CN21 Modem Ring-In wake up connector (reserved*)
CN22 Turbo LED connector
JP1 Power LED connector
JP2 System reset connector
JP5 Housing intrusion switch connector