Hello & Welcome to Just Answer,
Sorry to hear of any issue you are having with your device.
To help you with this issue, may I ask:1) When you say "the garmin download can't find it", does that mean the DEVICE is not found OR the course?2) The AGE of the device?3) WHEN was the device last used SUCCESSFULLY and when did this issue first began (or was noticed)?
I see it has been a few days and I just wanted to follow up to see if you have any more questions concerning this issue or if the issue was resolved.
I look forward to any further questions or results that you may have.
Thanks, ***** *****--. .-(im)