The AF points are not going to show if the lens is reversed. The camera needs the AF contact points from the lens to be able to activate them. The only way I've managed to not have any show is using a manual lens or fitting without electrical contacts. As has been said on the lower right of the viewfinder display, next to the meter is a green spot. This lights when focus is achieved, so even if the AF point's aren't lighting you should be getting this indicator, are you seeing this ? Given you've been reversing the lens, it might be the electrical contacts are grubbing up a little, have a close look at them, do they show signs of tarnishing ? (I'm not sure what the best option for cleaning them would be, so I can't recommend anything). If all looks good, put the lens back on the camera, set to AF, one shot, and the mode wheel to A-DEP, choose something like a textured table top, and try and focus at an angle of about 45 degrees. What happens ?