Rod; email Garmin and if you're the original owner then they'll probably replace your 110.
I find my Garmin works as it should 99% of the time; no messing about with HRM's, downloads straight to computer/Strava and aside from 1 run where the bezel locked up it's been pretty faultless. This sounds like a bag of spanners.
I'm in the same boat; it's down to the Garmin 910/310 or the Suunto Ambit II; the Suunto has the advantage of battery life but misses out on the cool functionality of the Garmin stuff. Both get good reviews on DCrainmaker; http://www.dcrainmaker.com/