Barometer calibration failure on 6.60

I didn't have 3 replacement, only 2. Never connected to any computer, only charged it with the oem new cable with a Sony Ericsson 600mAh charger. Auto update OTA. I have never used garmin express. Garmin service center replaced them, maybe they should be aware if it's a hw issue or not. 

Memmaao said:

I didn't have 3 replacement, only 2.

2 replacements means 3 watches to me (1st replacement for the second watch, and 2nd replacement for the 3rd watch), or am I wrong? The initial purchase does not count as a replacement. And now you tell you have the issue again, so I am confused.

Memmaao said:

Garmin service center replaced them, maybe they should be aware if it's a hw issue or not. 

If it were a HW problem with the USB port or the computer, then they could not see it. However you tell, you never connected the watch to a computer, so that possibility is excluded anyway. In that case it would be intresting to know how the other users who encountered the ABC defect updated their devices. If there are more of them who updated over the air, then there is perhaps an issue with the OTA update.

Maybe my English is not perfect, and that's why you don't understand it! My 1st and my 2nd watch had this issue, teherfore I had 2 replacements! The first one replaced my first watch and the second one replaced my second watch. My 3rd watch hasn't had this issue, and I don't know, why you think, I have the same issue again, I never told that!  The Garmin service told me, that it's a hw problem if the ABC sensor. That's it. Now, I have a Garmin Instinct solar, works perfectly. But I'm not the only one, who had this problem, if you read to the roots 9f this conversation, you can see it. Cheers

Memmaao said:

But I'm not the only one, who had this problem, if you read to the roots 9f this conversation, you can see it.

Yes, I know, but at most of them it turned out it was due to a failure during the firmware update, and it was resolved by rolling back the Sensor Hub firmware, and then updating it again (rolling back the main firmware alone mostly does not help). I guess that at the beginning, when multiple such cases started to pop out after each firmware update, Garmin Support did not know either where the problem comes from, and hence they were replacing the devices. Which was in fact absoutely not necessary (in very most cases).

Really! Because this very last comment from the past few days had only this conclusion. Before that, everybody posted, that re calibration didn't helped, Garmin arranged a replacement. I don't mind, if it's a sw issue, and Garmin figured it out, that cause less earth pollution than a replacement. But I'm pretty sure, if my solar will produce this issue too, here in Hungary, they will replace it again.

Memmaao said:

Before that, everybody posted, that re calibration didn't helped, Garmin arranged a replacemen

Calibration indeed does not help. You need to roll back the Sensor Hub firmware. Garmin Support apparently learned it only with the increasing number of such cases.

You can read the post from Garmin-Andrew, who posted the rollback Sensor Hub Software in the following thread, and there are also several users confirming it worked for them:

Altimeter/barometer/thermometer/PulseOX --> Sensor Hub Rollback 

In Garmin's software repository web where you can download the newest software, there is a note said:
"If attempts to upload software fail, you may need to return the device to Garmin® for service."

I think this is the major cause of all these problems.
What I can remember is that I set the auto-update to ON, then one day I downloaded a route from Garmin Connect to my watch. On Garmin Connect main page there is no notification if it is downloading a software update, there is just a rotating arrow showing we are in sync process ongoing. So after the sync process is done (the route has already sent to my watch), I turned off the connection, which I think interrupted the updated software download process.

I found lately that Garmin Connect shows us if there is software downloaded to the watch in the "Garmin Devices" menu. There is a progress bar excluded from the sync process for that. So we better not cut the connection off before it is completely done.