Same issue as described above. The Cube boots properly with the usb connected, amd all other peripherals attached to it get power when Cube is powered with USB.
But when the Cube is powered with the ESCs using LiPo Battery, the orange light comes on, but the Cube fails to boot, and no peripherals connected to it (GPS and raspi) get any power.
This started happening suddenly, and we have had sever succesful flights prior to this.
@Agnibha_Sarkar please share pictures of how the connections are made. Make sure you powering using 5V supply through Power1 and/or Power2 connectors. Measure the voltage on the supply line as well, share the results of the same here. Also ensure all devices are disconnected when doing this.