[Barrow4491]

Werk,
I have had two WD units for some time and find them great units with the only issue having been the occasional "not receiving data" red screen, which I put down to their location and local reception issues. With the latest Pro2 plus v5 software release the problem had appeared to be solved, along with an improved RF efficiency reported by my Rx.
A couple of days ago we had some wild thunderstorms and my Tx unit shut down (which turned out to be water entry to the connections of the outside Temp / Humidity sensor).
I had no notification of the failure on the WD units, and only noticed it in my office where the Rx had an odd looking screen at first glance, which turned out to be the screen saver clock superimposed over the red "not receiving data" screen.
I have replaced the sensor and all is OK again.
Have you any ideas what may be causing the "red" screen not to be displayed on the WD units?? 
In case it is relevant, I have RTC modules installed in the WD's but they have been there for a couple of years.
Regards
Jim