I think you found your problem, replace both cables.
Printable View
I ordered new extruder assembly and stepper motor cables from Flashforge on January 1st and got the parts on January 10th. I spent about three hours fixing my printer this morning and got it working. I have to order clips for filament guide tubes. Where can I buy them? What will I do with my new PowerSpec 3D Pro 2 printer?
I used my PowerSpec Ultra 3D printer for about 6 hours without any problems. I created filament tube clips in Inventor and printed them out. They look like "C" clips.