George (GGG) has posted them in the past.  I had them in a file here, but I can't find it right now.  They're FETs.  You should be able to read the part number off the part, I don't have the inclination to take a TIU apart right now.

Just an update and some info that may be helpful to others.  First, replaced the TVS diode and the  MOSFET (drivers)... No success, still no power out.  Now for the info I found.  The TVS diode MTH part number is BB_0000033 and the MOSFET (driver) is BB-0000068  looking at the TVS diode I pulled out I found the information printed on it and was able to order both parts from 

http://www.mouser.com

Screen Shot 2016-05-01 at 3.08.49 PMScreen Shot 2016-04-26 at 8.03.32 PMScreen Shot 2016-04-26 at 8.03.01 PM

Not all who wander are lost.

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