I don't have an answer, but I have heard of this problem. I haven't heard anything in about two years, but for a while there were a number of people complaining about their door openers not working. I have my FiOS ONT on the outside of my garage wall, and the BBU and power supply are inside the garage, and they have had no effect at all on my opener. I seem to remember that one of the causes was the opener being on the same circuit as the power supply for the ONT, but that could be wrong, and it doesn't seem to match very well with your symptoms.
I just did a search at DSLReports on "fios garage door" and got lots of hits. Here is a link to a thread at DSLReports about the problem: http://www.dslreports.com/forum/r17625885-fiosgarage-door-problem. If you go through the thread there are a number of suggestions, like not have the opener on the same circuit with the ONT power supply, to wrapping the BBU in tinfoil!
Hope this might help, it is a real problem for some people.
__________________________________JustinVerizon FiOS TV, Internet, and phoneIMG 1.6.0, Build 06.89Keller, TX
You are welcome. And if you try the tinfoil and it actually works, you absolutely must report that success back here!!!
Hmmm...off the bedroom windows? Is there an interesting story there?
Good luck.
I have definitely heard of this problem. If your ONT was placed inside the garage across from your openers transmitter this will cause this problem. Just call verizon back and they will move your ONT to another location in the garage and everything will work fine.
Sherry