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I have GE Simon 3 security system that was working. All of a sudden the panel is not poering on. I checked the AC Transformer input/output and it is working.

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  • Anonymous Jan 22, 2010

    I already replaced the backup battery (couple of months ago).

    DC Out from the edge of board is not showing any output.

    Where is the fuse located?



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You need to check the fuses first with a continuity tester then the 12v DC out at the edge of the PCB, if you can read 12vdc then you have a component failure if not then the rectifier has popped.

(The AC transformer supplies an AC output of say 16v and it is then rectified and smoothed before going to the pcb)

If you have had the same backup battery in for more than 3 years it may have popped that circuit

Posted on Jan 22, 2010

  • Anonymous Jan 23, 2010

    Take off the main cover

    Enter the code to stop the alarm

    Look for a 20mm glass fuse

    Normally there are two sometimes three depending on issue

    You need to remove them from their holders to check them



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