Omega 1 - Expansion board - external power supply problem

[David Stein]

Hi,
I got problem with my omega 1 when I try power it from external power supply ..

I got Omega on expansion board, omega looks like booting, after about 30s omega amber led stay solid light. But no Wifi, and I'm not able to connect via serial

I try connect 3,3V to 3,3V pin on expansion dock GND to GND - same issue
I try connect 5V to 5V pin on expansion dock GND to GND - same issue
I try connect just one (5V or GND and power it from usb) same issue

If I disconnect it from external supply GND and 5V and plug in USB it boot correct.

If I have connected one of external power supply cable (GND or 5V/3V) and cycle power with usb connected, in putty I got just mess characters

As power supply I use :
arduino breadboard power supply .

Any suggestion ? THanks

[David Stein]

Hm, It look like my device what is connected to GPIO (5V 8 Channel Relay Module Board For Arduino PIC AVR DSP ARM) drain a lot of power by GPIO

But why ?