The ornamental design for a televisionmonitor, as shown and described.
FIG. 1 is a perspective view of a television monitor showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a perspective view thereof showing the state in which the television monitor has been installed to a wall after the stand part has been detached;
FIG. 9 is a bottom plan view thereof showing the speaker which is located at the lower part of the television monitor's main body, the base has been removed for ease of illustration only; and,
FIG. 10 is a enlarged view of a part of the lower part of the television monitor's main body.