Yesterday I manually un-paired/deleted my Garmin HRM (HRM2-SS) from my 5X to attempt to solve a problem. I'm now trying to re-pair/add the HRM again but it just won't recognise the HRM at all. Through (adding) External Heart Rate I get 'Searching for Sensor' then after a few seconds of trying - 'Wear HR monitor to connect - Try again' (I am wearing it)
Strange - it's working one day then when I attempt to re-pair to the 5x its dead :( Electrodes look fine. New battery. Strap is brand new. Did an HRM 'reset'. Yes - I'm thinking the HRM module must have just died. My god they don't last very long !
have you tried to make it really wet, when you are wearing it before connecting?