I mean the transceiver.
I have a LED connected to BUSY output of the transceiver on both ( RX and TX modules ).
The RX transceiver blinks the LED everytime the TX sends data. But this doens not mean the PIC shows the correct DATA on LCD ( sometimes no DATA at all ).

And sometimes when powerup, the RX transceiver does not blink ( pic and LCD working OK ).

I'm using DEBUG/DEBUGIN instructions to avoid issues with Hserin/Hserout.