Question about APC Back-UPS ES 350 - UPS ( external ) - 350 VA - UPS battery lead acid - 6 output connector(s) (NEWITEM13161548) UPS System
My apc es 350 is making a loud squeeling noise. What is wrong with this backup device?
My solution was to unplug everything, hit the reset button, and then power the unit back up. The problem I found to be that I had my laser printer connected to the "surge + battery" side, and for some reason no laser printer can be connected to it.
Posted on May 28, 2009
I was able to fix mine by replacing the battery with a new one. charge the new battery for 12hours before turning it back on.
Posted on Apr 27, 2009
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Posted on Jan 02, 2017
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