Quick appeal for some advice if you don't mind. Been using a Garmin HRM with Edge 500 for the last 3 years with no major issues (at least once I switched out the crappy Garmin soft strap for the Polar equivalent). However, between riding home from work on Friday and going out for a spin on Saturday it just stopped working altogether.
Friday worked as normal, Saturday nothing, no rate shown on the Edge, no detection of the monitor (the Speed/Cadence sensot still picked up as normal, so I assume the problem is not with the Edge's ANT+ detector).
Replaced the battery, cleaned everything, gave the strap a good wash, and still nothing.
My only other possible test would be to fire up Zwift, and see if that can detect the HRM, but that still won't tell me which part is not working (other than the Edge of course).
I imagine that, as the Edge doesn't detect it at all, the most likely problem is that the HRM has simply given up the ghost?