UART0/2 not emitting proper signal on APM2.5 brand new board

Hi guys,

I use an xBee Explorer Regulated with an xBee Pro 802.15.4. The first one has an smd LED hooked up with the APM Tx wire, so I could verify if something is sent from the APM.

It was blinking even with the UART0/2 connection, but quite faintly.

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