I've got a small APC UPS for home use.
http://www.apc.com/shop/uk/en/products/APC-Back-UPS-500-230V/P-BK500EI
Came to it this morning & saw that it was running on battery (or so the orange light on the front panel indicated) despite being plugged into the wall socket & having power to it.
It is now currently sat on my desk, minus its battery, on a different power lead & plugged into a different wall socket .... and it still says it is running on battery. I can't get the unit to switch off unless I pull the power cable. When I re-connect it, it doesn't do anything other than light up the 'On Battery' light. No power on test or anything.
I can't find any way to reset it & also I cannot install the Powerchute software because my computer won't detect the APC unit & the software will not install unless it detects the unit.
Anyone got any ideas?...