[Richard L]

I think the problem may have something to do with the moisture in the air condensing onto the circuit board. There are very little heat generated from the box so putting the entire assembly in a plastioc bad may help. If you have WD40, give it a quick squirt (underside of the circuit board).

I have not heard this problem before from problem generated by the controller circuitry. Howerever, I have had report of this problem... mainly due to the RJ connector partially backing out when the latch tap is not full un-sprung. You can gently over stretch the latching tap, not so much so that you break it.