The ornamental design for a portion of a mediaplayer having an illuminatedwindow, as shown and described.
FIG. 1 is a top isometric view of a portion of a media player having an illuminated window showing our new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof; and,
FIG. 5 is a top view thereof.
The broken line showing of the various regions and the remainder of the media player is for illustrative purposes and forms no part of the claimed design. The broken lines, which define certain bounds of the claimed design, form no part thereof.