So I have a fairly new 540 that replaced a 520 - the one with the poorly designed cable interface. The 520 stopped charging. Anyway, after the problem with the 540 rebooting itself every 35-40 minutes on a ride got corrected the problem with elevation data being wildly inaccurate remains. Yes, the port is clean and I didn't stick anything in there or use compressed air on it - it is basically as it came out of the box six weeks ago and I'm using the new stem mounts that came with it.
It typically gets the climb data for a ride 1.5x-2.5x actual. What I noticed today was that while I was stopped and taking pictures for 3-4 minutes, the recorded altitude dropped about 125 feet. While I wasn't moving. Then when I got going again, the road dropped about 30 feet down and became pretty much level for a mile or so. The 540 recorded a 250 foot climb in that interval.
Yes, I can go in and correct the data - and it's actually pretty amusing the push from Garmin Connect to Strava, Strava throws out the data and uses their own automatically about half the time - but for the coin I dropped on this thing it is mildly annoying.
I have a ticket open on the reboots and the elevation issue from about three or four weeks ago so I'll probably get back on the phone when I have a couple of hours I don't know what to do with.
All of this is a long winded way of asking if anybody with more experience has any ideas how to make the stupid thing work like it is supposed to.
Thanks