Pixhawk not powering GPS

Hi friends, only today I had time to assemble my PIXHAWK and for my surprise the GPS modules and the RGB led aren’t working.

When I plug RGB led it disables the onboard led but doesn’t turn on the external one.
I checked the voltage in the GPS pins and I’m getting only 1.3v (I think the voltage should 5V isn’t it?).
I also checked the “SERIAL 4/5” and I2C ports and it’s the same voltage.
BUT in TELEM1 port I get 5V, It was working the 433radio well.
Any suggestions?

Take a look here: