Wait_for_Device fail 1.Retest ISP&BFT station fail,the fail item is "Wait_for_Device Fail";2.Visual inspection and x-ray no abnormal found;3.Measure impedance and diode voltage on main power rails/enable/USB/UART signal , compare measurement data with OK sample, no abnormal;4.Power on the MB with a power supply and found that the current has been kept at 20mA, and the normal current should be dynamically change from 20mA to 143mA during the boot progress .5.Measure the voltage of main power rails, it is normal.6.Use debug tool (baud rate 921600 and 115200)to try to capture boot log through Uart port , can capture the UART log by 115200 baud rate.