Thank you. Actually it's more often something I'm doing to cause this by handling the keyboard maybe. I thought I had solved the problem by going to Graphics Properties, then Display Settings but the option of 1440x90-60Hz is usually not available in the list under Screen Resolution. The options skip from 1280x1024 to 1400x1050. Set at 1400x1050, a warning comes stating 'Input Signal Out of Range Change settings to 1440x900-60Hz'. Sometimes that option appears in the drop down menu but usually not. It won't allow setting it manually here.