35 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 "Adjusting t...