While running my MTH 30-1638-1 Camelback Steam Engine I noticed sparking between the Engine and Tender. Looking closer I found the Drawbar attachment screw had backed out and the screw head was dragging on the tracks. I fumbled the parts but got it back together. Now when trying to start up in conventional mode, AC, the Engine seems completely dead, no headlight, no movement. The red Tender Clearance Lights do light up, and the Horn & Bell work. Is there anything I can do to troubleshoot this problem further?