it's possible a lead came off in moving them, tho it's strange it would have done so "completely" after several weeks. if you feel comfortable doing so, you can remove the tweeter (just slightly) from the cabinet to check the connections. if they appear ok, the tweet's likely blown or there may be a problem with the crossover or terminators. time to find a good technician. sorry about your (or your sister's) problem. -cfb
ps- i should have added that if a lead is loose or completely off, it will need to be reattached, either with high-quality solder or the provided "clip."
ps- i should have added that if a lead is loose or completely off, it will need to be reattached, either with high-quality solder or the provided "clip."