Hope you don't mind my coming in even though I do not have the exact same Canon a70 digital camera model;
I have a Canon s40 which seems to have the same operating basis as your newer a70.
The orange light is a warning, not just for the fact that a flash is required. I assume that your problem is that the camera does not go ahead to take a picture even when you press the shutter release button all the way.
If your battery does not sufficient charge for the flash, and it is required, then no pic will be taken. Could it be that?
My s40 has 3 optional focus zones rather than one. All pics are very well focused. Except when I do not have enough lighting and camera shake due to longer exposure times causes blurred pics.
Or it could be the photo printing resolution of your printer which can not differentiate between your lower spec-ed HP and the Canon (600 dpi or below).