After trying many times to sync my Garmin SE+ to the computer, i finally called tech support. I had been able to sync it with no issues before until recently when it said "device not found" and kept spinning. Apparently the cables can still charge from the computer but they are defective and the data function no longer works. In the end, the Garmin rep knew what was up and is sending out a new cable to try. Hope this helps someone with the same issue. Will try to update on the new cable.