I have a 2014 -700-4 that is flashing all the lights on the dash. I trickle charged the battery (unhooked) for a day and a half and hooked it back up, but when I turned the key on, every light on the dash began to flash and nothing happens when I turn the key further. The battery was really dead, could it be alternator issues? There has been a history of the battery needing to be charged about once a month, even though the machine is not driven much. We did have a lot of extra stuff hooked to the battery; winch, lights, wipers, that I have since unhooked. All I have is the owners manual.