All the USB ports of my Dell Inspiron 17R, 5720 are not working. When I connect a USB drive I hear the 'connected sound,' the light in the USB flashes red to show it is connected but no USB drive logo appears in My Computer.
I have tried multiple thumb drives, cell phone, tablet and also updated BIOS, Chipset and all USB drivers but the problem persists.
Screenshot of my Device Manager.
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Dell Inspiron 17R, 5720: All USB ports not working!
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