"Jerry G." wrote in message
ups.com...
Either the internal power supply, or inverter (if there is one), has a
short, or one of the stages, especialy the output stage, is pulling too
much current.

The only way to find this, is to isolate the various stages in the set,
and see which one is causing the fault. You will most likely have to
cut a few traces to do this.



Sounds like he's already isolated it and it's still shutting down so this
isn't particularly helpful.