GAVERY - I assume you checked for obstructions while you were up there. That antenna is known to get a little sloppy on the elevation. The gear that attaches to the elevation shaft (not the crank shaft) tends to allow the dish to flop up and down a few degrees in the wind. It usually doesn't hurt the reception. Possibly yours has totally rounded off and slipped on the shaft. With the antenna cranked up as far as it will go, try to lift the dish up further. If it will lift, the gear is slipping on the shaft and you will probably have to replace the antenna.
As for the elevation digital readout - mine quit working about a year ago and I found a chart in the manual that shows how many turns to crank it up for various elevations. Kind of a pain to stand there counting cranks, but it works and increases your powers of concentration....
I plan to replace mine with the Winegard Slimline SOON...