Surface pro 4 keyboard backlight not working

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If offered the option to delete the driver software for this device, ensure that the checkbox to do so is selected (not all devices offer this option) and click ‘Uninstall’: Click the ‘Change Settings’ button, then from the dialog that is shown select ‘Uninstall Device’.In turn, select each of the device functions shown in the list and click the ‘Properties’ button:.Select the Surface Type Cover and open the properties for this device.Open Control Panel and navigate to ‘Hardware and Sound’ and then ‘Devices and Printers’.To correct this issue, complete the following steps:

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The Surface Pro 3 was imaged and then patched up-to-date and the most recent Surface Pro 3 drivers available from Microsoft were applied, however the issue persisted.

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