Hi !
It looks like a touchpad hardware problem.
Windows 10 Device Manager indicates Error 24 on the touchpad device driver.
Is there a Touchpad Replcement guide ?
How can I verify if it is a simple misconnected cable or the device itself?
Although I cannot relate the touchpad malfunction to a previous lab visit (on another issue) it might be a simple issue of not re-assembling a flat-cable or something.