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Posted: 2021-06-2909:11 PM
APC ES500 annoying continuous beeping sound
This was originally posted on APC forums on 10/7/2013
My APC ES500 with Serial #: 5B0834T26544 when i plug it then switch it on continuous single long beep sound occurs. i already replace new battery for it but same problem. i purchase it last july 2011.. please help what is the remedy of this. thanks and more power!