After searching for information from the internet, I got the idea how to ensure the power to the USB ports are cut off during the Sleep mode. The following steps work on my notebook:
- Go to the Device Manager dialog box. How? Click Start ⇨ Control Panel ⇨ Device Manager.
- Make sure the "Allow the computer turn off this device to save power" check box is checked for every USB Root Hub. How? Click Universal Serial Bus controllers ⇨ Right-click USB Root Hub ⇨ In the USB Root Hub Properties, click Power Management tab ⇨ Make sure the check box is checked. See the picture below.
- Make sure Allow this device to wake the computer checkbox for the HID-compliant mouse is unchecked. How? Click Mice and other pointing devices ⇨ Right-click HID-compliant mouse ⇨ Click Power Management tab ⇨ In the HID-compliant mouse Properties, make sure the checkbox is cleared as shown in the picture below. Repeat this step for each HID-compliant mouse in the Device Manager list.
- Make sure Allow this device to wake the computer checkbox for the keyboard is unchecked. How? Click Keyboards ⇨ Right-click HID Keyboard Device ⇨ Click Power Management tab⇨ In the HID Keyboard Device Properties, make sure the checkbox is cleared as shown in the picture below.
- That's all. Try making the computer going into Sleep mode and see that all the devices connected to the USB ports are turned off automatically.
I hope the tip above can help us. Thanks.
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