Toshiba Satellite 1955 User Guide - Page 200

200 If Something Goes Wrong Resolving a hardware conflict The built-in screen flickers. Some flickering is a normal result of the way the screen produces colors. To reduce the amount of flickering, try using fewer colors. To change the number of colors displayed: 1 Point at the desktop and click with the secondary button. 2 Click Properties, and then the Settings tab. 3 Change the Colors option and click OK. For more information, see Windows® Help. A message tells you that there is a problem with your display settings and that the adapter type is incorrect or the current settings do not work with your hardware. Reduce the size of the color palette to one that is supported by the computer's internal display. To change the display properties: 1 Point at the desktop and click with the secondary button. The Display Properties window appears. 2 Click Properties, then click the Settings tab. 3 Adjust the screen resolution and/or color quality. 4 Click OK. The display mode is set to Simultaneous and the external display device does not work. Make sure the external monitor is capable of displaying at resolutions of 800 x 600 or higher. Devices that do not support this resolution will only work in Internal/External mode. Disk drive problems Problems with the hard disk or with a diskette drive usually show up as an inability to access the disk or as sector errors.