CWI529 ZLA Lapbook

I have recently acquired a CHUWI CWI259, 14 inch lapbook.
The serial number is ZLA Q128G80180404449.
What model is it? I am unable to find a match to the ZLA.
I am assuming the unit has 8GB RAM and 128GB Storage, from the serial number.
It seems as though the graphics chip may be dead as I cannot get a picture on screen OR via the HDMI.
Power seems OK and I can toggle both the CAPS lock and NUM lock, LEDs show.
Any help with the model and graphics problem could result in me being able to repair the unit.