Click-zoom.

Thats sounds rather similar to what my new Sony display does. It usually does this after it has flickered a bit and gone blurred. I've had trouble finding information about it. I'm guessing that these problems would be caused by the same things on different monitors. If anyone has any suggestions as to what causes this I would be grateful to hear.

It tends to do it randomly so can easily go a week or maybe two without any problems, then will do it several times in the same week.