Just in case...

If you find that the display is kind of fuzzy and the focus control has no effect, then you have a burnt out resistor on the analog board. I don't remember which one, but I've seen this symptom enough times, that I think it's worth mentioning. It's an easy fix. It's a pretty common 1/4 watt or similar resistor.

If that turns out to be the problem, report back and I'll try to remember to look it up in one of Pina's books, or someone else might have the information.