A friend of mine had a Creality CR10 V2 which he purchased some time ago. Evidently it had a bad board in it and he received a replacement but never got around to installing it.

I now have this printer and have replaced the board in it. I have tested the movement along each axis and tested the extrusion. Everything looks to me like it should be ready to go, but I haven’t been able to get it to recognize when an SD card is inserted or when I have a computer connected to it.

I’m a 3d printing newbie and I’m not sure where to go from here. Is it me? Am I doing something wrong? Or is it the printer?

Any advice or guidance on this would be appreciated.

Thanks!