I'll let someone else find all the info on it, but my favorite (in part because he is also a UT engineer) came from Alan Bean.

The TV camera on Apollo 12 was behaving badly (I think they pointed it at the sun and the optics were damaged) and pictures were very unclear. Houston offered advice and the astronauts tried lots of things to fix it; nothing worked. Finally, the picture could be seen jiggling sharply, twice, after which the picture improved a bit. Houston asked what they had done.

Bean replied, "I hit it with my hammer."

__________________
Never attribute to malice what can be adequately explained by ignorance or stupidity.
Isaac Asimov