Lenovo X380 Fingerprint reader showing "disconnected": any fixes?

Here's my situation. I've got a Lenovo X380 Yoga with a built-in fingerprint reader. After recent Windows updates, the fingerprint reader disappeared. After digging into DevMgr, I find that this Biometric device is only viewable when I click the "Show hidden devices" option, and it shows the following status when I do that:

I've tried updating/reinstalling the drivers (and the Intel SGX device that bridges from the peripherals bus to the system circuitry apparently) and the status remains disconnected. I have not even moved the machine around much since I got it about six weeks ago. I'm inclined to believe that the fingerprint reader has failed. Can anyone offer an alternate diagnosis or a different repair strategy?

TIA for your input and suggestions.

--Ed--

PS: the unit is under warranty and I can ship it back to Lenovo for repair and diagnosis for the cost of shipment. Curiously that's about the same cost as that for purchasing a new replacement fingerprint reader. I'm wondering further if I shouldn't just order a replacement and do the repair myself. Thoughts?

Here's a Lenovo forums post that confirms my suspicions:

Unless somebody has other ideas, I think I know what I need to do next. Again: please share your thoughts and suggestions.
TIA,
--Ed--

If you have a Macrium Reflect system image backup mount it and use Device Manager to update driver but choose to install by browsing your system image backup for the driver.