This is one I've never seen before !!!

Customer dropped a file folder which fell catty-corner on the keyboard. As a result the whole display is now turned sideways. She has turned the machine off and back on, switched monitors and still no help. A search of the database points to monitor yoke problems but this is not the case. Has anyone seen this happen before?? She is now working with monitor sideways. Slightly elongated screen display but no other apparent problems.

Machine - Hewlett Packard Pentium IV 2.0 processor, 2.0g memory.