Dell Vostro 2521 (Early 2013) - Manual (Page 27)

c) memory module
d) hard-drive assembly
e) optical-drive assembly
f) keyboard
g) palmrest
h) display assembly
3. Press the hinge cover on the side. Lift and remove it from the computer.
4. Pry the edges of the display bezel. Remove the display bezel from the computer.
Installing the Display Bezel
1. Align the display bezel in place and snap it in place.
2. Align the hinge covers on display assembly and snap it in place.
3. Install:
a) display assembly
b) palmrest
c) keyboard
d) optical-drive assembly
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