OK, thanks for the pointers. Here's what I found. F16 was blown. Went in and changed it out with the fuse for the Rt Slingshot solenoid. The Left Solenoid fired, but stayed engaged. Turned machine off as quick as I could, but it was enough to blow the 5A Slow Blow near the power switch. It, in turn, fused the fuse "closed" and actually started smoking from overheating the fuse in the fuseholder. Once the fuse gave out, the machine died...
Pulled the 1.5A from F16, replaced the 5A at the power switch, powered the machine back on and it came up again.. Thank the lord...
So, it seems as if something is keeping that solenoid engaged. Checking, but it looks like the contacts are properly gaped. What now?