There have been problems with military use of the 300 MHz band for new
radio systems, but this would not cause the door to work only half way.

Assuming the neighbors problems are coincidental, check the
counterbalance spring for the door. They wear out or break and the
opener does not have enough power to work on irs own. By the way this is
not a DIY project because of safety concerns with the springs and the
repairs can be about $300.

Dick wrote:

My aunt, who lives in So. Calif., along with two close neighbors, is
suddenly having problems with garage door openers. Won't open. Stop
part way down, etc. I haven't heard of amateur radio having an effect
on modern garage door remote receivers. How about BPL? Don't know if
it can effect things in the 900 Mhz region, but thought I would ask if
anyone else has seen this.

Dick - W6CCD



--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

"Follow The Money" ;-P