Solving Problems 59If the display is difficult to readTE S T T H E E L E C T R I C A L O U T L E T — Ensure that the electrical outlet is working by testing it with anotherdevice, such as a lamp.CH E C K T H E AC A D A P T E R — Check the AC adapter cable connections. If the AC adapter has a light,ensure that the light is on.CO N N E C T T H E C O M P U T E R D I R E C T L Y T O A N E L E C T R I C A L O U T L E T — Bypass power protection devices,power strips, and the extension cable to verify that the computer turns on.SW I T C H T H E V I D E O I M A G E — If your computer is attached to an external monitor, press to switch the video image to the display.AD J U S T T H E B R I G H T N E S S — Press to increase the brightness and todecrease the brightness.MO V E T H E E X T E R N A L S U B W O O F E R A W A Y F R O M T H E C O M P U T E R O R M O N I T O R — If your externalspeaker system includes a subwoofer, ensure that the subwoofer is at least 60 cm (2 ft) away from thecomputer or external monitor.EL I M I N A T E P O S S I B L E I N T E R F E R E N C E — Turn off nearby fans, fluorescent lights, halogen lamps, orother appliances.RO T A T E T H E C O M P U T E R T O F A C E A D I F F E R E N T D I R E C T I O N — Eliminate sunlight glare, which cancause poor picture quality.AD J U S T T H E WI N D O W S D I S P L A Y S E T T I N G S —1 Click the Start button and then click Control Panel.2 Click Appearance and Themes.3 Click the area you want to change or click the Display icon.4 Try different settings for Color quality and Screen resolution.SE E "ER R O R M E S S A G E S " — If an error message appears, see page 48.