Hi all

I am very new with 3D printers, but my makerbot replicator 2 is no longer working.
It prints the groundraft successfully and then suddenly moves diagonally into a corner, squirting filament in drops on the groundplane.
You can see a video of the problem here: https://youtu.be/IDRFLYuQ4b4

I have updated and reflashed the firmware (currently at 7.6).
Loaded and unloaded the filament. Homed the axis and leveled the bed.
I have tested a print file that worked without a problem previously.
I have tested printing from USB compared to SD-card.

I still prints the raft perfectly, which is strange. So it can still do the things it needs, move along the designed path and extrude.

I have no idea what is going on and what to try next.
Does someone have any idea what to try next to try and fix it? Has anyone ever seen this kind of behaviour before?