Got a problem with a CBF250. Engine will crank but not start. No spark. interestingly when the key is turned to the ON position the gauges flick up as they should as part of their test and the LCD screen illuminated as it should. A few seconds later the screen fades, the instrument lights go out and the gauge needles drop to below 0 and beging a very short flicking. This flicking occurrs for a up to a minute , even with the key turned off. If I turn the key on again the gauges may repeat the above but for a much shorter time. If it doesnt repeat the gauge needles will just sit there flicking for 10 or 20 seconds or so. Battery is strong and has been on charge for several days. Headlight is strong too. Any ideas where to look for the problem.