An update... Arrived to find the display unit dead. Either those were the worst batteries in the world (new radio shack enercells) or the display unit drained them in a month. I suspect the former.
Replaced batteries in display unit with new Costco cells.
LEDs on the bridge aren't blinking, just solid on. Unplugged and replugged the power, went to do other things. After an hour or so, the 5in1 started reporting again, but only one time. Then signal was lost.
Switched the 5in1 to channel C (it was on A), pulled a battery in it for a bit, then replaced the battery. Also cycled power via battery pull on the display unit. Still very very weak signal.
Replaced the batteries in the 5in1 with another (fresh) set of everready lithiums, cycle power on the display unit. Still very weak signal. Wandered all over the house looking for good signal to little avail.
Gave up and set the display in the (literally) one spot where it gets good signal from the 5in1 because it appears to act as a relay between the 5in1 and the bridge...
Is that correct? If the display unit is dead then "no signal" is reported to my backyard weather on the web? Or does the bridge get its information directly from the 5in1? What if the display unit is fine but it can't get a signal from the 5in1, what does my backyard weather say then?
Set up two tower sensors, they seem to be performing quite well, indoors and out. I think for grins I'll move one to where the 5in1 is so that I have a second transmitter at the same location--that should let me know if my house construction is behind the very low signal.
I'll probably give customer service a call, I will hope someone's there tomorrow but actually hope they're not!