I have a Venus GPS logger from SFE, the problem is that I cant get any data from it.GPS is connected trough a logic level converter to ftdi board. Voltage on vbat pin is 3.3V. As I have seen on pictures of this pcb, the nav led is pretty bright, mine isn’t 
It is even hard to see if it is on. I have tried to supply voltage from different sources, the problem keeps. Please help a newbie 