Anonymous posted an answer for this APC BE500U ES 500 USB BACK-UPS 500VA/300W 120V (NEWITEM13161417) UPS System:
"My BE500U backup UPS ES is emitting a continuous alarm. Is this a dead/dying battery issue..."
Anonymous posted an answer for this APC BE500U ES 500 USB BACK-UPS 500VA/300W 120V (NEWITEM13161417) UPS System:
"I found cooling fan was seized, causing overlheat, and loud whistle. WD 40 eased up the..."
Computers & Internet 1 answer