Been running PS CS5 successfully for a couple of years, then all of a sudden I can't work at magnifications other than 25% and Actual Pixels. The image disappears and I only see the checkerboard. There was a Windows update I ran on April 10 that included an update to the graphics card, which I thought might have been the culprit, so I uninstalled it. That didn't fix the problem, so I updated it again. I couldn't see anything else in those updates that should affect Photoshop.
Here is what I've tried so far:
I updated my graphics driver (NVidia GeForce),
Trashed Adobe Photoshop CS5 Prefs.psp (which crashed PS completely when I reopened it...luckily I kept the old prefs file on my desktop and dragged it back in),
Made sure Photoshop was up-to-date.
Any ideas what to try next?
Photoshop CS5 (v.12.0.4 32 bit)
Windows 7 Home Premium (v.6.1 Build 7601: Service Pack 1)
AMD Phenom II X4 840 Processor 3.20 GHz
It's a bug in your video card driver.
Either turn off GPU drawing in Photoshop, or contact NVidia and figure out what is wrong with the driver.
I KNEW it had something to do with the graphics card. I turned off GL drawing in the preferences, and it works perfectly now. Thanks for your help.
Your video driver still has a problem, and you'll be missing out on GPU enabled features until you get the driver software fixed.