I have a 2005 r1200gs. I had not ridden it for a few weeks and the battery was flat when I came to start it. I put the battery on charge, using a trickle charger and leaving the battery in situ. It appears that the battery is now charged, as the headlight will briefly come on brightly, but although the start sequence initialises, the headlight goes out, the screen is dim and the green neutral light and a red light flash alternately. The best I can get when pressing the start button is a click of the solenoid, but usually, not even that. Any ideas?