Here is the link to the main Vino Temp Online Support page with all the service manuals, troubleshooting guides and user manual.
Here is the direct link to the Troubleshooting Guide:
And here is the direct link to the Detailed Service Manual:
If you have a digital multimeter (voltmeter) and a screw driver then you can do most of the troubleshooting yourself. You should be able to tell if it is a controller board problem or a refrigeration compressor problem just by following the instructions in the guides.
If it is a control board problem you should be able to fix it with just a soldering iron, or if you need new parts, they should be available on Ebay.
If the problem is with the refrigeration compressor then any refrigeration technician (even in Mexico) should be able to fix it. Especially if you provide him with the service manual above.
Good luck and please comment back and rate if this was helpful or if you need further assistance.