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Doubt regarding EVAL-SDP-CB1Z board

I am using EVAL-SDP-CB1Z board in conjunction with EVAL-AD5770RSDZ

Initially I installed the required software to program AD5770R in my PC and then connected the SDP-B with AD5770R. Then connected SDP-B to my PC via USB cable. I did  not powered AD5770R board. My PC was detecting both the board and I could program the registers from software. But after some time suddenly the green power LED on SDP-B board went off and the software also couldn't detect the board. I don't know why this happened.

After that I tried connecting only SDP-B board to my PC but still the power Led was not glowing. Is it because of some short circuit somewhere or some component damage?

Please provide required assistance.