USB Ports on a Lenovo T440P are not working. When I go under device manager none of the Ports have a yellow exclamation point. Not sure what else to do?
If you plug in an optical mouse, does it light up?
if not then it sounds like you have a defective or damaged power circuit (usb has a 5v line to power devices) possibly caused by damaged usb ports which are easy to see.
If you plug in an optical mouse, does it light up?
if not then it sounds like you have a defective or damaged power circuit (usb has a 5v line to power devices) possibly caused by damaged usb ports which are easy to see.