I think it may be the Graphic issue.
Check your graphic card and driver
We have a similar issue where our problem is that for a view or views it will only show up with no lines removed (all solid) or in shaded mode. Hidden lines shown or hidden lines hidden shows a blank view. with annotations. The lines will highlight when you pass over them, but disappear when your cursor leaves. If it's video card related, it is affecting two different Quadro models and one ATI card. We have submitted a pack and go to our VAR in hopes of getting some resolution.
We have seen this before and it seems to have something to do with sheet-metal multi-body parts of a certain size.