I have a DC31 to repair. According to Dyson the slow green flashing light means the battery is dead or not charging but the 22.2 V battery has 20 V of charge. It periodically switches on for a little while, but 90% of the time there's no power at all, just the slow flashing green light.
I think it might be an intermitent connection in the motor housing but impossible to gain access.
Has anyone fault found one of these before ?