This was all I could find searching for the model number and "service mode" or focus.

These are dell's suggestions:

Poor Focus-
Picture is fuzzy, blurry or ghosting.

1. Eliminate video extension cables.
2. Perform monitor reset (Select "reset" in main menu).
3. Select "moiré" from advanced controls and set H & V Moiré at 0%.
4. Decrease contrast & brightness via and controls.
5. Lower video resolution or increase font size.

I tried all of the above, except for the stupid font size suggestion. Thats just dumb.

Oh well, guess I'm in the market for a new monitor.
Anybody who upgraded to an LCD want to offload their old 19" or 21"?