A handheld computing device includes a screen to receive input from and provide graphical output to a user, a housing engaging a peripheral portion of the screen, a light source, at least one light guide to receive incident light from the light source and direct the incident light to the screen to illuminate a portion of the screen, and a light guide bracket to engage the housing and the at least one light guide, the light guide bracket maintaining a position and orientation of the light guide relative to the light source.