[werk_ag]

Thanks for all the help. Changing the 2N007 didn't make a difference. I have left the Nano in monitor mode - i assume that wont make a major difference ?

Its a 2N7000.

With a multimeter, please check if pin 7 on the nano is pulsing more or less every 3 seconds.
Also check if there is 9V in one of the LED pins.
If yes, and assuming the 2N2007 is working properly, the LED should lit (if it isn't damaged).

Before replacing the TX module, try to discover why the TX LED isn't blinking. If it isn't blinking the TX module may not be powered correctly. It is powered only during the period the LED is blinking.