MLX90640 example not working, broken module?

I just bought a MLX90641 and a MLX90641. I connected them to the who terminar and flash both the examples with text in terminal and graphics in lcd.
The MLX90641 works very well, the MLX90640 does nothing, a led turns on but nothing is shown in the serial or lcd.
Is the shield broken or the code on the wiki wrong?
Would love to know since this is quite an expensive shield,