I have a TS508.  I plugged it in for 8 hours to get it charged up.  I registered it and went thru the update process.  Now I cant get it to find a sensor.  I purchased 4 new sensors for my 2012 Jeep Wrangler.  It cant detect a sensor of the four new.  I went out to a brand new vehicle that is working and the scan tool cant find any of the sensors either.