34 Troubleshooting 9. TroubleshootingFrequently asked questions (FAQ)The image is blurred:Read the How to adjust the screen resolution on page 19 section, and then select the correct resolution, refresh rate and make adjustments based on these instructions.How do you use a VGA extension cable?Remove the extension cable for the test. Is the im age now in focus? If not, optimize the image by working through the instructions in the How to adjust the screen refresh rate on page 20 section It is normal for bl...