Lenovo ThinkPad Hard Disk Drive, User Manual

Page: 111 / 170

Solution : Ensure that the external numeric keypad is correctly connected to the computer.
Problems with the display and multimedia devices
This topic includes the most common problems with displays and multimedia devices, including the
computer display, the external monitor, and audio devices.
Computer screen problems
• Problem : The screen is blank.
Solution : Do the following:
– Press the display mode-switching key to bring up the image.
– If you are using the ac power adapter, or using the battery and the battery gauge shows that the battery
is not depleted, press the brightness-up key to make the screen brighter.
– If your computer is in sleep mode, press Fn to resume from the sleep mode.
– If the problem persists, follow the solution for the following problem.
• Problem : Incorrect characters are displayed on the screen.
Solution : Did you install the operating system or application program correctly? If they are installed and
configured correctly, have the computer serviced.
• Problem : The screen stays on even after you turn off your computer.
Solution : Press and hold the power button for four seconds or more to turn off your computer; then
turn it on again.
• Problem : Missing, discolored, or bright dots appear on the screen every time you turn on your computer.
Solution : This is an intrinsic characteristic of the TFT technology. Your computer display contains
multiple thin-film transistors (TFTs). A small number of missing, discolored, or bright dots on the screen
might exist all the time.
• Problem : My screen keeps blanking when I do not want it to.
Solution :
1. Go the desktop and click the battery-status icon in the windows notification area.
2. Click More power options ➙ Show additional plans ➙ High performance .
• Problem : When I turn on the computer, nothing is displayed on the screen and the computer does not
beep while starting up.
Note: If you are not sure whether you heard any beeps, turn off the computer by pressing and holding the
power button for four seconds or more. Turn it on and listen again.
Solution : Ensure that:
– The battery is installed correctly.
– The ac power adapter is connected to the computer and the power cord is plugged into a working
electrical outlet.
– The computer is turned on. (Turn the power button on again for confirmation.)
If a power-on password is set:
– Press any key to display the prompt for the power-on password. If the brightness level of the screen is
low, increase it by pressing the brightness-up key .
– Type the correct password and press Enter.
Chapter 8
.
Troubleshooting computer problems
95