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ADS5282EVM: Connectivity problems with laptop

Part Number: ADS5282EVM
Other Parts Discussed in Thread: ADS5282

Hello to all,

We recently bought an ADS5282 Evaluation board and we face connectivity problem. I would like to mention that we have succesfully worked with the same evaluation boards previously. At this time when try to connect  the ADC to a laptop via USB cable providing the nominal +5V and GND to the board, the device is not recognized by the laptop. I checked the voltages in the FTDI chip and I noticed differences from a functional ADS5282EVM used previously. 

In a functional board I measure: +5V in L1, C2, L5, C73, pin2, 3, 4 in FTDI chip.

In the problematic board I measure: +4,5V in L1, C2, L5, C73, pin2, 3, 4 in FTDI chip.


What could be the problem in a new board, not used before? 

Thank you in advance,