Dell Latitude E7240 Ultrabook Desktop and Notebooks Users Guide - Page 56

Video and Display Problems, If the display is blank, If the display is difficult to read

Get Dell Latitude E7240 Ultrabook PDF manuals and user guides View all Dell Latitude E7240 Ultrabook manuals
Add to My Manuals
Save this manual to your list of manuals

Page 56 highlights

If you are using a mouse extension cable, disconnect it and connect the mouse directly to the computer. To verify that the problem is with the mouse, check the touchpad - 1. Shut down the computer. 2. Disconnect the mouse. 3. Turn on the computer. 4. At the Windows desktop, use the touchpad to move the cursor around, select an icon, and open it. If the touchpad operates correctly, the mouse may be defective. Tasks Check the system setup program settings Test the mouse controller Re-install the touchpad driver Description Verify that the system setup program lists the correct device for the pointing device option. (The computer automatically recognizes a USB mouse without making any setting adjustments.) To test the mouse controller (which affects pointer movement) and the operation of the touch pad or mouse buttons, run the Mouse test in the Pointing Devices test group in the Dell Diagnostics Ensure you have the latest touchpad driver installed on your computer. Video and Display Problems CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Safety and Regulatory Information documents. If the display is blank NOTE: If you are using a program that requires a higher resolution than your computer supports, it is recommended that you attach an external monitor to your notebook. Tasks Description Check the battery If you are using a battery to power your computer, the battery charge may be depleted. Connect the computer to an electrical outlet using the AC adapter, and turn on the computer. Test the electrical outlet Ensure that the electrical outlet is working by testing it with another device, such as a lamp. Check the AC adapter Check the AC adapter cable connections. If the AC adapter has a light, ensure that the light is on. Connect the computer directly to an electrical outlet Bypass power protection devices, power strips, and the extension cable to verify that the computer turns on. Adjust the power properties Search for the keyword standby in the Windows Help and Support Center or Click Start > Help and Support. Switch the video image If your computer is attached to an external monitor, press [Fn] [F8] to switch the video image to the display. If the display is difficult to read Tasks Adjust the brightness Move the external subwoofer away from the computer or the monitor Description Press [Fn] and the up- or down-arrow key. If your external speaker system includes a subwoofer, ensure that the subwoofer is at least 60 cm (2 ft) away from the computer or external monitor. 56 Troubleshooting Your Computer

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
If you are using a mouse extension cable, disconnect it and connect the mouse directly to the computer.
To verify that the problem is with the mouse, check the touchpad
-
1.
Shut down the computer.
2.
Disconnect the mouse.
3.
Turn on the computer.
4.
At the Windows desktop, use the touchpad to move the cursor around, select an icon, and open it. If the touchpad operates correctly,
the mouse may be defective.
Tasks
Description
Check the system setup program settings
Verify that the system setup program lists the correct
device for the pointing device option. (The computer
automatically recognizes a USB mouse without making
any setting adjustments.)
Test the mouse controller
To test the mouse controller (which affects pointer
movement) and the operation of the touch pad or
mouse buttons, run the Mouse test in the
Pointing
Devices
test group in the
Dell Diagnostics
Re-install the touchpad driver
Ensure you have the latest touchpad driver installed on
your computer.
Video and Display Problems
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the
Safety and
Regulatory Information documents
.
If the display is blank
NOTE:
If you are using a program that requires a higher resolution than your computer supports, it is recommended that
you attach an external monitor to your notebook.
Tasks
Description
Check the battery
If you are using a battery to power your computer, the battery charge may
be depleted. Connect the computer to an electrical outlet using the AC
adapter, and turn on the computer.
Test the electrical outlet
Ensure that the electrical outlet is working by testing it with another device,
such as a lamp.
Check the AC adapter
Check the AC adapter cable connections. If the AC adapter has a light,
ensure that the light is on.
Connect the computer directly to an electrical outlet
Bypass power protection devices, power strips, and the extension cable to
verify that the computer turns on.
Adjust the power properties
Search for the keyword
standby
in the Windows Help and Support Center
or Click
Start
>
Help and Support
.
Switch the video image
If your computer is attached to an external monitor, press
[Fn] [F8]
to
switch the video image to the display.
If the display is difficult to read
Tasks
Description
Adjust the brightness
Press
[Fn]
and the up- or down-arrow key.
Move the external subwoofer away from the computer or
the monitor
If your external speaker system includes a subwoofer, ensure that
the subwoofer is at least 60 cm (2 ft) away from the computer or
external monitor.
56
Troubleshooting Your Computer