I recently purchased your i3 pro B kit from your geeetech-official eBay store.
After I assembled it, the printer works, but the LCD2004 shows only 2 rows of blocks as seen in the picture I made: https://goo.gl/photos/5SuCk6gBFTXT1zEv6
SD card works. Dial button also works - beeps when pressed and was able to home the printer by random rotation and press. Reset button also works.
...And yes, I made sure only discount smart controller is defined in configuration.h. And yes, I reflashed the firmware several times since it was not for my printer and all motors were reversed.