Here are my steps that I have gone through,

Main screen says "idle queue empty material Remaining 0%"
load material
'material load unloading'
'material load both cartidges not replaced or invalid'


Then since that will not work I go to 'maintenance'
machine
head
'maintenance both drive motors'
forward (little came out)
Done
'is material loaded?'
Yes
"trying to read cartridge"
"Could not read model cartridge'