29 Troubleshooting7. TroubleshootingFrequently asked questions (FAQ)The image is blurred:Read the instructions on the link " Adjusting the Screen Resolution " on the CD, 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 imag e now in focus? If not, optimize the image by working through the instructions in the "Adjusting the refresh rate " section on the link "Adjustin...