Toshiba l450-sp2918 Reference Guide

52

5.375 x 8.375 ver 3.1

If you are using an external monitor:
❖ Check that the monitor is turned on.
❖ Check that the monitor’s power cord/cable is firmly plugged 

into a working power outlet.

❖ Check that the cable connecting the external monitor to the 

computer is firmly attached.

❖ Try adjusting the contrast and brightness controls on the 

external monitor.

❖ Press 

Fn

 and 

F5

 simultaneously to make sure the display 

priority is not set for the built-in screen.

Small bright dots may appear on your screen display when you turn 
on your computer. Your display contains an extremely large number 
of thin-film transistors (TFT) and is manufactured using high-
precision technology. Any small bright dots that may appear on 
your display are an intrinsic characteristic of the TFT 
manufacturing technology. Over a period of time, and depending on 
the usage of the computer, the brightness of the screen will 
deteriorate. This is also an intrinsic characteristic of the screen 
technology. When the computer is operated on battery power, the 
screen will dim and you may not be able to increase the brightness 
of the screen while on battery power.

If you have followed the recommendations in this section and are 
still having problems, you may need additional technical assistance. 
This section contains the steps to take to ask for help.

Since some problems may be related to the operating system or the 
program you are using, it is important to investigate other sources 
of assistance first.

Try the following before you contact Toshiba:
❖ Review the troubleshooting information in your operating 

system documentation.

❖ If the problem occurs while you are running a program, consult 

the program’s documentation for troubleshooting suggestions. 
Contact the software company’s technical support group for 
their assistance.