Strange issue on outside one one side and only vertically

[TTVert]

It's two separate stl files that did this. Both were larger boxes.. I don't use the SD card, i use repetier server/host which sends data directly. I use the repetier host embedded cura slicer. Not to say it's not the slicer but i've never had any issue like this before w/ this slice. Here is one of the STSs, it's literally a box. I will double check the wiring as it can't hurt but if it was that it'd be pretty impressive that it occurred on onlly one side.