Anthony Hoffman has a great tutorial on clock circuit repair
Very good resource and even though its for a 4000, I've been able to do some mental gymnastics to keep track of the tests. However, I ran into something odd.
With the 3000 daughtercard installed, I get a good solid continuous continuity tone from the +5V feed to ground. With the daughtercard removed, its only a chirp (which I associate with capacitors charging). The daughtercard looks pristine and I don't readily see anything that would suggest a short.
Should there be 'continuity' between +5V and ground with the daughtercard installed? This seems to me to be a bad thing to have...
