Acer Altos G540 Series - Manual (Page 68)

3 System upgrade 58
4 Remove the FBD.
(1) Press the holding clips on both sides of the socket outward to
release the DIMM.
(2) Gently pull the DIMM upward to remove it from the socket.
5 If you intend to install a new FBD, proceed to the next section for
related procedure, otherwise reinstall the air duct, then observe
the post-installation instructions described on page 38.
To install an FBD:
1 Perform steps 1 through 3 of the previous section.
2 Select an empty FBD slot.
3 If necessary, open the holding clips of the selected FBD slot.
4 Remove the new FBD from its protective packaging, handling it by
the edges.
5 Install the FBD.
(1) Align the FBD so that the notch on the slot fits the keyed edge
of the module, then press the module at both ends to seat it
fully into the slot.
If you insert an FBD but it does not fit easily into the slot, you
have inserted it incorrectly. Reverse the orientation of the
module and insert it again.