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Article Number: 000135356

Touch Screen May Have Intermittent Issues or Stop Working Due to Power Management Settings

Summary: Steps for configuring power management settings to get touch screen to work correctly.

This article may have been automatically translated. If you have any feedback regarding its quality, please let us know using the form at the bottom of this page.

Article Content

Symptoms

The following article gives information about touch screens not working after power management settings are changed.

Touch Screen Inoperative After the LCD Display is Disabled by Power Management

You may encounter a situation where the touch input of the touchscreen display will not work after the power management disables the touchscreen.

EXAMPLE: If you set the screen to DIM after 2 minutes and TURN-OFF after 3 minutes. Moving the mouse, hitting any key turns the display back on, but the touch input no longer works.

Note: If your system does not have a Human Interface Device (HID) listing in Device Manager, then this article does not apply to your system.

Cause

Cause information is not available.

Resolution

Adjust HID USB Power Management Setting in Device Manager

The solution is to adjust the power setting in device manager under Human interface Devices (HID) devices (Figure 1).
SLN290492_en_US__21396294896539.USBI
Figure 1

To resolve this issue, complete the following steps:

  1. Open Device Manager.
    Windows 7:

    1. Click Start
    2. Type Device Manager
    3. Click Device Manager on the menu

    Windows 8/8.1
    1. At theStart screen
    2. Type Device
    3. Click the Device Manager icon

     

  2. Click the arrow next to Human interface Devices. You should see 2 items that are listed as a USB device.

    1. Right-click each USB Device and click properties on the drop-down menu
    2. In the USB Device properties window, click the power management tab
    3. Under the power management tab, there is a checkbox next to "Allow the computer to turn this device off to save power"
    4. Uncheck the check box then click OK. Repeat these steps for the second USB Device.
    5. Reboot the system.

     

The touch screen should retain touch functionality after it is turned off. You can use either the mouse, keyboard, or touch screen to turn the LCD back on (Figure 2).
SLN290492_en_US__31396294852665.USB
Figure 2

If you have further questions about this solution, please contact Dell Technical Support.

Additional Information

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Article Properties

Affected Product

Latitude E7240 Ultrabook, Latitude E7440

Last Published Date

05 Jan 2024

Version

4

Article Type

Solution

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