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Transmitter failure on the nRF51 ?

I've been running a hand soldered prototype board for about a week in an outdoor location where it gets hot and cold (mainly hot), and I noticed it was no longer visible on BLE.

I checked that the nRF51 was responding to the debugger, and uploaded my application with Logging turned on, and as far as I can tell, the MCU is running as it sends strings to the log just like normal.

However I can't detect it at all on BLE, either on an iOS or Android device.

Its possible that the antenna has a dry joint, but I am surprised that if this has happened, I can't detect the device at all, even right next to it.

I presume this is possibly because the external components of the antenna are somehow part of the active circuit and there will be no transmission at all without those components being connected.

Can someone confirm this is the case, i.e a dry joint could completely stop transmission.

BTW. I realise if there was a short on the antenna to ground that could have the same effect, but in this case I think an open circuit is more likely, as it was running for several days before it went wrong

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