CHAPTER 7: Troubleshooting90The color is not uniform• Make sure that the display warms up for at least30 minutes before making a final judgment about coloruniformity.The text on the display is dim or difficult to read• Adjust the brightness and contrast controls.• Change the display settings. For instructions, see youronline User Guide.• For more information about display types, see yourdisplay and video card documentation.PrintingThe printer will not turn on• Make sure that the power cable is plugged into anAC power source.The printer is on but will not print• Make sure that the Print to file box is not checked inthe Print dialog box.• If the printer you want to print to is not the defaultprinter, make sure that you have selected it in the printersetup.To set a default printer:1 Click (Start), type printer, then press E NTER.Control Panel opens and lists available printers.2 Right-click the printer you want to be the defaultprinter, then click Set as Default Printer.HelpFor more information about changing the screen resolution, click Start,then click Help and Support. Type screen resolution in the Search Helpbox, then press E NTER.