A method for manufacturing a display element comprising a plurality of pixels, each comprising a plurality of subpixels. The method comprises undertaking, using a pick up tool, a first placement cycle (1908) comprising picking up a plurality of first, untested LED dies and placing them on a display substrate at locations corresponding to the plurality of pixels, testing (1912) the first LED emitters on the display substrate to determine one or more locations of non-functional first LED emitters, selecting one or more second tested LED dies based on a result of the test, configuring the selected one or more second LED dies to enable their pick up and placement on the display substrate and undertaking, using the PUT, a second placement cycle (2008) comprising picking up the selected one or more second LED dies and placing them on the display substrate at the determined locations of the nonfunctional first LED emitters.