Wait for the board to finish booting. The booting progress can be monitored by observing the user leds 1, 2, 3 and 4 on the DragonBoard410c which are placed between the two USB
type A connectors. During boot the leds (especially led 3 and 1) will blink very rapidly. When led 1 is the only one left blinking (about once a second) the boot has finished.