I suggest you connect wires flowing to the sticker on top of the TFT device
The color code that you mentioned is correct
- Blue on the TFT100 -> White on the RFID Reader (1-wire data)
- Yellow on the TFT100 -> Brown on the RFID Reader (VCC+)
- Black on the TFT100 -> Green on the RFID Reader (GND)
To be on the same page, Have you checked the card frequency or even change it?
The card frequency should be 125KHZ
In case the issue is still, please, reach out to your sales manager, where you can create a VIP ticket and get a solution to your issues