There is not really one good window range for all graphs, since graphs can have different areas of interest.
Press the ZOOM key, then select ZStandard. This will restore the standard window settings (the default range), which will at least allow the graph to be displayed (but eventually you will not see anything ^^). You can then change the window range and zoom as you want.
If this doesn't solve the problem, please give more informations about the function you want to draw.