Originally Posted by
jrobe
One time my powertap locked up and wouldn't download - the cpu said "host" but Cyclingpeaks said no device was recognized. I finally decided to remove the battery in the CPU and reinstall it. This unlocked the cpu and it has worked fine since. I thought I would lose my ride data for that day but it was still on the cpu and downloaded fine. This was the only problem I have ever had with mine.
my apologies jrobe.
When I DL'd my PT today, yesterday's ride data was on there. Last night when I removed and reinstalled the battery the screen displayed zeros for all the values. I assumed that since the CPU had zeros for every value that there was no data. But in fact yesterday's data was still there.

Thank you for your post. It gave me the courage to remove and reinstall the battery to unfreeze the CPU.