Hi everyone,

I currently have a device (an alarm) that is being sold and I have 54 of them in the field. Everything is going well but my customer called me this past Monday and said one of them didn't work. When I got the unit back, I found the 16F688 was shorted. This wasn't installed on anything yet, he was doing his functional test to verify the correct operation so I am kind of ruling out noise and other things like that. All of the units are soldered professionally by Screaming Circuits and of course they are all designed the same. Should I just chalk this up to infant mortality? I don't "burn" them in but rather do a quick functional test before they ship, which takes less than 2 mintues to verify the correct operaton of the alarm. Like I said, this is the first failure I have had. Any help is greatly appreciated.

Thanks,

Chris