I have never had a problem with a "scanner" going through x-ray equipment.
However, I did have a problem with a volume knob getting burned out once by the x-ray equipment used at the airports in a professional cassette tape recorder. The volume input knob stopped working on one of the input channels after passing through the airports. It worked fine before the airports and not afterward. I took the unit apart and the substance used to lubricate one of the potentiometers was burned black to a crisp along with the circular metal strip which makes the potentiometer work! Due to having some home made electronic projects in the mix they spent a little extra time looking over everything which likely played a part in causing the damage.
So, the moral of the story is that yes x-ray equipment can damage electronic equipment however my experience with this is that it has only happened on one occasion.
Shawn