In this video from oorail.com we demonstrate how to repair the 9F 92156. This particular model from Hornby suffers from weak solder joints between wires on the locomotive and the coupling to the tender. The motor is in the tender on this 9F and when the solder joints fail, the pickups on the locomotive no longer provide a connection to the rails. The pickups on the tender aren't sufficient for smooth running. Some of the symptoms include not starting at all, to running intermittently to…