To determine which point does not lie on the line given by the equation $2y+5x-4=0$, we will substitute the coordinates of each point into the equation.

Step-by-Step Verification:

1. For Point A (0.8, 0):
- Substitute $x=0.8$ and $y=0$ into the equation:
$$2(0)+5(0.8)-4=0+4-4=0$$
- Since the left side equals the right side (0), point A lies on the line.

2. For Point B (1, -0.5):
- Substitute $x=1$ and $y=-0.5$ into the equation:
$$2(-0.5)+5(1)-4=-1+5-4=0$$
- Since the left side equals the right side (0), point B lies on the line.

3. For Point C (0, 2):
- Substitute $x=0$ and $y=2$ into the equation:
$$2(2)+5(0)-4=4+0-4=0$$
- Since the left side equals the right side (0), point C lies on the line.

4. For Point D (2, 3):
- Substitute $x=2$ and $y=3$ into the equation:
$$2(3)+5(2)-4=6+10-4=12$$
- Since the left side (12) does not equal the right side (0), point D does not lie on the line.

The correct answer is D. (2, 3).