I have replied to my own post thread on this, and now Garmin are back up on phone support and other areas, I have called.
It seems that the 650T has a bug that causes the device to power down after retrieving the information, it seems some units experience it more than some others, and mine seems to do it all the time. It has been reported as bug in the early days, but it seems whilst the software developers are aware of the issue and the fix is still pending deployment, its not listed as a urgent fix, plus the last software update was back in 2019 (as the unit was released in 2013), the 750(t) does not have this issue.
Since the 650(t) was made in 2013 and the 750(t) in 2017, even today the 750(t) is their latest current model after 3 years, and the 650(t) which is still available at dealers is no longer a current model and whilst not discontinued, it is getting less support. I was also told they have no newer models in development at this time (i.e. no 8xx series)
After long a very helpful and long chat with their support technician, I was only offered one course of action, which was to return my 'new' (as it is still in new in box condition) to Garmin at my expense, and then after 10 days (Quarantine rules - which is what I was advised plus Covid delays) a refurbished unit with a new case/shell but refurbished interior, would be shipped at the cost of over £100 with just 90 days warranty.
The other option was a new unit at full cost with 24 months warranty, which is what I have opted for via Amazon, since I have the Topographical maps from my 650T, I can get the 750 at a reduced price over the 750T saving myself about £50-£100. The 650T will be retained as a back up unit, and also should the fix be ever deployed it will then become a good second unit for Geocaching.
With regards to the Factory Reset route, I was advised as this was a bug (known bug) it is unlikely a factory reset would fix this and therefore would be a waste of my time and effort, so therefore would not fix the issue.
I agree Chirp users are scarce, it is a shame as the technology for them is so under used, and they are great fun for multi cache, and likewise offer a completely different challenge to those who enjoy the hobby.
In fact sadly, smart phone users miss out unless they can find an app or add on to their phones to benefit, so it is predominantly Garmin Users who benefit the most and easiest.
The one cache I own, people who have garmins have messaged me to say they enjoy the change in the experience and I do plan to set up another which is a longer multi, as my current one is just 1 chirp and a final.
