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J721EXCPXEVM: Buzzing Noise from the board and 5V0 not turned ON

Part Number: J721EXCPXEVM

Hi,

I am facing the issue of buzzing noise from the J721EXCP01EVM and bootup not happenning. The set up occupied with Common BRD(Proco79 rev E2), SOM BRD(PROCO78 Rev1.0), Quard port ethernet BRD( Proco80 E2). 

I look for the schematic for the J7X common processor BRD Rev E2, but not able to find it. Could you please share the schematics for the revision E2.

And I am not able to find the VSYS_IO_3V3 power generation in the revision PROC079A_RP schematic files.

I measure the voltages of following: 

Sl.No Voltage Rail Measured value Expected
1 V3V3 3.3037 V 3.3 V
2 VSYS_3V3 3.3023 V 3.3 V
3 VSYS_5V0 0 V 5.0 V
3 VSYS_3V3_SOM 3.3039 V 3.3 V
4 VSYS_IO_3V3 0 V 3.3 V
5 VSYS_MCUIO_3V3 0 V 3.3 V
6 VSYS_IO_1V8 0 V 1.8 V
7 VSYS_MCUIO_1V8 0 V 1.8 V

Could you suggest the right way of finding the issue.