Lenovo THINKSERVER 3821 - Manual (Page 161)

4. Press the retention tabs 1 on the hinge assembly toward each other and pull
the hinge assembly out of the chassis.
Note: The bezel will also disengage from the chassis hinges if you rotate the
bezel beyond 180° or if excessive pressure is applied to the bezel. Do not be
alarmed because this is how the bezel was designed. The bezel is designed
with breakaway hinges so that you can easily reattach it to the chassis.
5. If you are instructed to return the bezel, follow all packaging instructions, and
use any packaging materials for shipping that are supplied to you.
Chapter 7. Installing optional devices and replacing customer replaceable units 153