Intermittent dead bike

Hi all, Im having a bit of drama with my 2011 fe570. Twice now I have hit the start button to fire it up and get absolutely no response, no fuel pump, no starter motor, no lights, nothing at all. I test the battery and it has good voltage, all the fuses are ok and its not wet or full of mud etc Both times I left the bike for a day and tried again but still nothing, then disconnected the battery, reconnected it and it fired up?????????? the same thing happened a couple of days apart.I have the map switch fitted but apart from that no other electrical mods except a different headlight bulb which was put in after these events. Has anyone else had this problem? Any ideas? one thing I did notice was my test light dims slightly when I was hitting the start button and getting no love from the machine so the voltage has to be getting somewhere. NFI!!