I can open my photoshop document but cannot see it. When I click on it without letting go, I can see what is in that document and when I let go it disappears. I open a new document and then click OK then it disappear also.
What version of Photoshop? Are you on Windows? Sounds like your graphics card driver is out of date. Go to either the nVidia or AMD/ATI website (based on what card you have) and download the latest video drivers.