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[Gismo]

Had a problem today, my CM15A did not turn on lamps.  It never fails so I looked at the ac circuit and my kid had the laptop plugged in.  I unplugged it, sent a command and it worked fine, but not when the laptop was charging.  Just letting everyone know, things like this could stop the commands.   

[Brian H]

Laptop power supplies are high on the list of X10 power line signal problem makers.
You maybe able to use an X10 type filter on it or move it to a location where it does not effect your automation setup.