Asus AP2400R-E1 - Manual (Page 20)

Chapter 2: Hardware setup 2-6
5. Tighten the thumbscrew on the
rear corner of the cover to
completely secure the top cover.
Thumbscrew
2.1.5 Removing the air duct
To remove the air duct:
1. Carefully route the cables that
may interfere when removing the
air duct.
Be careful not to pull off or break any cables while removing the air
duct.
2. Hold the rear part of the air duct
and press it for about a fraction of
an inch, just enough to tilt the
front end.
3. When tilted, carefully pull the air
duct upward to release it from the
chassis.