Hi @lenovot450 ,
Making assumptions here, going on your User ID.
Are you asking about a Lenovo T450 or a Lenovo T440s USB port?
If it’s a Lenovo T450 then here is a link to the service manual for the Thinkpad. Scroll to p.81 to view the necessary pre-requisite steps and then the procedure to replace the USB board.
Here’s a link to just one supplier of the replacement part. It’s not a recommendation to use them. It’s shown to give and idea of the cost of the part. There are other suppliers online that may suit you better. Just search for Lenovo T450 USB board part to get results.
If it IS a Lenovo T440s that you’re asking about, then here is a link to the service manual for the Thinkpad. Scroll to p.72 to view the necessary pre-requisite steps and then the procedure to replace the USB board.
Here’s a link to just one supplier of the replacement part. It’s not a recommendation to use them. It’s shown to give and idea of the cost of the part. There are other suppliers online that may suit you better. Just search for Lenovo T440s USB board part to get results.