Acer TravelMate 4000 - Manual (Page 17)

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# Item Description
1 Power jack Connects to an AC adapter.
2 External display port Connects to a display device (e.g., external
monitor, LCD projector).
3 100-pin port replicator
connector
(Manufacturing option) Connects to an I/O port replicator, or
Acer EasyPort expansion devices.
4 Security keylock Connects to a Kensington-compatible
computer security lock.