One thing you may want to do is flash the firmware to make sure it is not corrupted. You can download the software from the site or you can download T2 software and use it to upgrade the firmware. See if that fixes it first before moving on to hardware issues.
@EchoNeko15 I am the developer of T2Laser software which is not connected with Eleks.
I purchased one of their machines several years ago and found the supplied software to be lacking (and that's being kind) so wrote my own. I have since purchased several machines from Eleks and other vendors. Mechanically I believe the Eleks to be one of the best designs but the supplied controller and software are sub standard. Both are easily upgraded though, so I still feel like the Eleks is the best option for the price.
Where you set 0,0 is the center on the laser and aligns to the center of the image (total pixels, so your design must be centered in the image). If it's off then perhaps your image has more white space on one side or you aren't finding center of the item (if it's rectangular you can draw lines from corner to corner and the intersection will be the center).
The perforated grid is made of aluminium 1.5mm. The support frame underneath is milled from a multiplex plate. Underneath is a 20cm air space, where the focus of the laser beam increases so that it does not burn the base plate. Additionally there is a piece of aluminium on the base plate. At the back wall there is a toilet ventilator which sucks the combustion gases and pushes them to the back via an air hose. Possibly a few air baffles in the lower air chamber would be worthwhile so that the extracted air is sucked in more homogeneously.
@CompWhisperer One last thing to try. Unplug the USB and remove the Nano clone from the controller board and put in on something insulating, plug it in and see if it works. If there's a short on the board it would prevent it powering up, this would confirm if the "Nano" is bad or the actual controller.