SWF Color Changing Solenoid Problem

[Flash Ink]

I have a 601-c SWF machine. Ran great for a while then started having problems. We have replaced a bunch of things on it and now we are at an impasse. The jump solenoid will always stay extended now and gets very hot. We replaced the upper joint board and the jump solenoid as advised by SWF and 2 other techs, now it will not work. Any advice would be great.

[Audifox]

Not sure if that particular problem is listed here, but it's a place to start.
http://embroiderytrainingvideos.com/Table/SWF-Embroidery-Machine-Support/