Acer Aspire 5540 Service Manual page 65

11. Remove the two screws holding the speaker set.
12. Take out the speaker set from the lower case.
13. Remove the three screws fastening the system fan.
14. Detach the fan from the lower case.
15. Disconnect the RTC battery cable then detach the RTC battery.
16. Disconnect the launch board FFC from the main board.
17. Disconnect the modem cable from the main board.
18. Disconnect the modem board from the main board.
19. Disconnect the modem cable from the modem board as shown.
Chapter 3 59