I have a Dell Lattitude 12 Rugged 7202 tablet. 

The CMOS battery needed to be replaced so I did this and now for some reason the tablet Device Manager says that the tablet does not have a touch screen or pen.  I have owned this system for a number of years and have enjoyed the touchscreen and pen feature and is one of the primary reasons I purchased it.  When I had to take apart the tablet to get to the CMOS battery there were three ribbon cables that attached to the MB one is a wide cable with a lock bar the second wider cable was just a push into as well as the third which is a thinner ribbon cable.  Now with the 3rd thinner cable the plastic hold down piece broke off.  I had to use tape to hold this ribbon cable down.  I tried looking for a service manual which tells me what this particular ribbon cable does.  I suspect it may have something to do with why the system does not recognize the touchscreen / pen of the tablet but can not verify if it does.  Is there anyone out in this community that can advise me?

Thank you