A display module comprising: a module support structure (13; 43); a plurality of light-emitting elements coupled to the module support structure; and one or more latch assemblies configured to removeably couple the module support structure to a support chassis , wherein each of the one or more latch assemblies comprises; a first magnet movably coupled to the module support structure at a first location, the first magnet being movable relative to the module support structure between a first position and a second position; a second magnet movably coupled with the module support structure at a second location, the second magnet being movable relative to the module support structure between a first corresponding position and a second corresponding position; and a shaft connecting the first magnet and the second magnet so that the first magnet and the second magnet move together such that the second magnet is in the first corresponding position when the first magnet is in the first position and is in the second corresponding position when the first magnet is in the second position; wherein a magnetic attraction between the second magnet and a corresponding third magnet attached to the support chassis is stronger when the second magnet is in the first corresponding position than when the second magnet is in the second corresponding position. a module support structure (13; 43); a plurality of light-emitting elements coupled to the module support structure; and one or more latch assemblies configured to removeably couple the module support structure to a support chassis , wherein each of the one or more latch assemblies comprises; a first magnet movably coupled to the module support structure at a first location, the first magnet being movable relative to the module support structure between a first position and a second position; a second magnet movably coupled with the module support structure at a second location, the second magnet being movable relative to the module support structure between a first corresponding position and a second corresponding position; and a shaft connecting the first magnet and the second magnet so that the first magnet and the second magnet move together such that the second magnet is in the first corresponding position when the first magnet is in the first position and is in the second corresponding position when the first magnet is in the second position; wherein a magnetic attraction between the second magnet and a corresponding third magnet attached to the support chassis is stronger when the second magnet is in the first corresponding position than when the second magnet is in the second corresponding position. a first magnet movably coupled to the module support structure at a first location, the first magnet being movable relative to the module support structure between a first position and a second position; a second magnet movably coupled with the module support structure at a second location, the second magnet being movable relative to the module support structure between a first corresponding position and a second corresponding position; and a shaft connecting the first magnet and the second magnet so that the first magnet and the second magnet move together such that the second magnet is in the first corresponding position when the first magnet is in the first position and is in the second corresponding position when the first magnet is in the second position; wherein a magnetic attraction between the second magnet and a corresponding third magnet attached to the support chassis is stronger when the second magnet is in the first corresponding position than when the second magnet is in the second corresponding position. <EOS>