Complete new user here!

I assembled a Saphire Pro corexy printer and I'm wondering if the mainboard is faulty or the problem is me ?

The auto levelling works and the extruder works but when I load the calibration square block from the supplied SD card it shows it's printing but never makes any progress to actually print anything. The hot end and bed are up to temperature.

I installed Mattercontrol on my laptop and it seems that the printer cannot be found using the USB connection.

The documentation supplied with the printer is woefully inadequate and does not cover actually using it or give any parameters or specifications or what the touch screen icons actually do.

Being a complete beginner with no previous knowledge perhaps I expected a bit more useability after assembly.

Allan