I've got an S20BLK that refuses to power up. I've put fresh batteries in, which usually solves most of the problems with APC units. But with this unit, still nothing. The only sign of any life I can see is that the small red "Wiring fault" led will briefly blink once when the rear power cord is connected.
The unit is out of warranty, so I'm willing to try "heroic efforts" that would otherwise void the warranty. Any suggestions?
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