Need printer repair recommendation UV printer

Hi fellow hackers. I have a UV flatbed printer that I purchased from China and need service on it. Below is a link for the printer. I’d love some suggestions on what companies you know may be able to work on this printer. I am having trouble finding anyone in Austin. The issue is the motherboard is shorted out. I am trying to work with the Ebay seller I purchased it from but have little hope that will lead anywhere. THANK YOU for any help you can give me.

The model is: ACHI-A3-UV-Printer-1390-Printed-Head-for-Cylindrical-Flat-3D-Rotation.

It uses UV ink and I use it to print onto plastic and ceramic. When it works it’s awesome, problem is since I got it, there has been more downtime than working time!