When you get the message. "Waiting for motion task to initiate" try hitting F4 on your service tool. This will take you to the next level, which will probably be "Drive Parameter Mismatch" and if you hit F4 again it will probably tell you "Bad Floor Table" and if you hit F4 again it will take you to the ready screen.

Probably a bad SRAM on your CPU.

It Don't mean a thing if it aint got that swing.

Cool, Free, Johnny Smith courtesy of NPR..HERE
http://www.npr.org/ramfiles/asc/asc25.smith.asx