FIG. 1 is a perspective view of the flip down monitor base with the monitor in an opened position showing the new design;

FIG. 2 is a perspective view of the flip down monitor base with the monitor in a closed position;

FIG. 3 is a front elevational view of the flip down monitor base;

FIG. 4 is a rear elevational view of the flip down monitor base;

FIG. 5 is a left side elevational view of the flip down monitor base;

FIG. 6 is a right side elevational view of the flip down monitor base;

FIG. 7 is bottom plan view of the flip down monitor base; and,

FIG. 8 is a top plan view of the flip down monitor base.

The broken lines are for illustrative purposes only and form no part of the claimed design.