41• Reinstall the device driver.• Connect a monitor that you know worksto your computer.The color is not uniform• Make sure that the monitor warms up forat least 30 minutes before making a finaljudgment about color uniformity.The text on the display is dim or difficult toread• Adjust the brightness and contrastcontrols.• Change the display settings. For moreinformation.For more information about display types, seeyour monitor and video card documentation.MouseThe mouse does not work• Make sure that the mouse cable isplugged in correctly.• Shut down and restart your computer.• Remove all extension cables and switchboxes.• Try a mouse you know is working tomake sure that the mouse port works.The mouse works erratically• If the mouse pointer begins movingerratically across the computer display orbecomes difficult to control precisely,cleaning the mouse will likely improve itsaccuracy.• Clean the mouse by wiping the bottomwith a clean, damp cloth. Make sure thatthe optical sensor is clean and free ofdebris.HelpFor more information about changing the screen resolution,click Start, then click Help and Support. Type screen resolution in theSearch box, then press E NTER.