Keyboard Problems; Computer Screen Problems - Lenovo ThinkPad E575 User Manual

– When the temperature changes
• Problem: The TrackPoint pointing device or trackpad does not work.
Solution: Ensure that the TrackPoint pointing device or trackpad is enabled in the Mouse Properties
window. For more information, see "Customizing the ThinkPad pointing device" on page 22.

Keyboard problems

• Problem: All or some keys on the keyboard do not work.
Solution: If an external numeric keypad is connected:
1. Turn off the computer.
2. Remove the external numeric keypad.
3. Turn on the computer and try using the keyboard again.
If the keyboard problem is resolved, carefully reconnect the external numeric keypad.
If the problem persists, ensure that the correct device driver is installed by doing the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or
Small icons.
2. Click Keyboard.
3. Select the Hardware tab. In the Device Properties pane, make sure that you see this message:
Device Status: This device is working properly.
If keys on the keyboard still do not work, have the computer serviced.
• Problem: All or some keys on the external numeric keypad do not work.
Solution: Ensure that the external numeric keypad is correctly connected to the computer.
• Problem: The keys on the top row of the numeric keypad might not function the same as the icon printed
on each key.
Solution: Do the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or
Small icons.
2. Click Keyboard. In the Keyboard Properties window, click the Fn and function keys tab.
Note: If the Fn and function keys tab is not displayed, connect your computer to the Internet. Then
download and install the ThinkPad Hotkey Features program from the Lenovo Support Web site.
3. In the How to use Fn key combinations section, select your preferred option.
4. If you select Fn sticky method, press Fn to reset the Fn sticky status.
5. Try to press keys on the top row of the numeric keypad again to check if the problem is resolved.

Computer screen problems

• Problem: My screen keeps blanking when I do not want it to.
Solution:
– If your computer is preinstalled with the Windows 7 operating system, you can disable any system
timers, such as the LCD turn-off timer or the blank timer by doing the following:
1. Start the Power Manager program. See "Accessing Lenovo programs" on page 11.
2. Click the Power plan tab, and then select Maximum Performance from the predefined power
plans.
– If your computer is preinstalled with the Windows 10 operating system, do the following:
1. Go to Control Panel, and ensure that you view Control Panel by Category.
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ThinkPad E570, E570c, and E575 User Guide