A display apparatus comprising: a frame; a display module comprising at least one substrate on which a plurality of light emitting elements is mounted, and a bracket to which the at least one substrate is attached; a magnetic coupling device configured to couple the frame to the display module by pulling the display module toward the frame by using a magnetic attraction force; and a separation prevention device configured to mechanically prevent the display module from being separated from the frame and configured to be operated by an external magnetic force; and wherein the separation prevention device comprises: a latch and a catch, wherein the latch is rotatable between a locking position where the latch is locked in the catch such to mechanically prevent the display module from being separated from the frame and an unlocking position where the locking between the latch and the catch is released such to allow the display module to be separated from the frame, characterised in that a magnet is mounted to the latch, and the latch is installed in the frame and is rotatable from the locking position to the unlocking position or from the unlocking position to the locking position according to the external magnetic force applied to the magnet, the catch is fixed to the display module, and the display apparatus further comprises a first magnetic member installed in the bracket and configured to fix the latch to the locking position by using a magnetic attraction force between the magnet and the first magnetic member, wherein the first magnetic member is a coupling member configured to fix the catch to the bracket. a frame; a display module comprising at least one substrate on which a plurality of light emitting elements is mounted, and a bracket to which the at least one substrate is attached; a magnetic coupling device configured to couple the frame to the display module by pulling the display module toward the frame by using a magnetic attraction force; and a separation prevention device configured to mechanically prevent the display module from being separated from the frame and configured to be operated by an external magnetic force; and wherein the separation prevention device comprises: a latch and a catch, wherein the latch is rotatable between a locking position where the latch is locked in the catch such to mechanically prevent the display module from being separated from the frame and an unlocking position where the locking between the latch and the catch is released such to allow the display module to be separated from the frame, characterised in that a magnet is mounted to the latch, and the latch is installed in the frame and is rotatable from the locking position to the unlocking position or from the unlocking position to the locking position according to the external magnetic force applied to the magnet, the catch is fixed to the display module, and the display apparatus further comprises a first magnetic member installed in the bracket and configured to fix the latch to the locking position by using a magnetic attraction force between the magnet and the first magnetic member, wherein the first magnetic member is a coupling member configured to fix the catch to the bracket. a latch and a catch, wherein the latch is rotatable between a locking position where the latch is locked in the catch such to mechanically prevent the display module from being separated from the frame and an unlocking position where the locking between the latch and the catch is released such to allow the display module to be separated from the frame, characterised in that a magnet is mounted to the latch, and the latch is installed in the frame and is rotatable from the locking position to the unlocking position or from the unlocking position to the locking position according to the external magnetic force applied to the magnet, the catch is fixed to the display module, and the display apparatus further comprises a first magnetic member installed in the bracket and configured to fix the latch to the locking position by using a magnetic attraction force between the magnet and the first magnetic member, wherein the first magnetic member is a coupling member configured to fix the catch to the bracket.