if it goes past the rollers eventually hitting the wall then you probably have a damaged push roller sensor which is located under the cutting heard. Try disableing the sensor by turning the ploter ON while pressing the DOWN arrow button, hit next and look for Y home or push roller, select disabled, ENTER then turn off then back on normal. sorry i'm not 100% sure but most Graphtecs have the option to disable the sensor so that you can still work. after you've done this you'll have place the tip of the blade at the origin point where you'll like to start the job, and make sure that the job is not bigger that the vinyl width because the plotter is now blind I guess you can say. oh yea, if you reset the plotter and then connect it and get an error 1 after sending a job, switch the command option to the option that is not selected: either HPGL or GPGL