no message about any problems. just read "armed way". in other words, i armed the system before going to bed, woke up and the #10 zone was blinking but system was still armed. i pressed the test button on the #10 door monitor and the flashing stopped and the system stayed armed. not really worried just wondering if this meant anything that i could correct. one zone not working while armed is like a game of russian roulette. gonne try batteries, i guess even new batteries could be bad. thanks everyone for all your help