No Image Output

  

If the image display appears to be wrong, or nothing appears to be displayed it is likely that you have previously used the Z-SCALE command to set the scaling mode to semi-automatic, or fixed scale. If the present image is outside the range then the image will appear totally uniform (black or white for most of the colour tables).

To overcome this problem, use the Z-SCALING button to set the scaling mode back to fully automatic, or set a reasonable range.