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This was originally posted on APC forums on 7/2/2015
My APC Back-UPS ES 700 intermittently emits a long constant tone - approx 10 sec.
Power light flashes red then reverts to solid green when tone stops.
Happens randomly several times a day, whether computer is on or off.
Never done this before. Had it for two or three years.
Is battery on way out? Never replaced.
No sign of power loss/fluctuation. Have another UPS elsewhere in house.
Welcome any advice.
thanks in advance
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