Question about APC Conext 900VA (cnb900) UPS System
I had the same model/symptoms (no lights on the front panel). I had a compatible, though smaller, battery from a Verizon Fios backup unit, and I tried that in the UPS--it worked. That confirmed that I just needed a new battery.
Posted on Jan 23, 2016
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Posted on Jan 02, 2017
I took my Conext CNB900 to Batteries Plus and they put in a new battery and checked the unit and found that the new battery solved the problem.
Wilson in Houston
Posted on Jan 23, 2009
It could be that the cable to the front-panel got damaged during the battery replacement. After all these years you would think APC would improve that aspect of their design. All I can suggest is inspecting the cable and where it connects to the front panel.
Posted on Apr 26, 2009
Replace 24v dc small fan, it does not work!
You can buy a new one here
Posted on May 04, 2009
Try looking for a small circuit breaker on the side that says "press to reset" - you could have tripped it accidentally when you unplugged the iPod. Also, try pressing and holding the UPS power switch for 10-15 seconds. That should force a power on as well.
Posted on May 27, 2009
if this comes sometimes and goes, this means that the power to ups is sometimes deviating from the specific ups input range, hence the ups is rejecting it. mesure the input voltagesand frequency with a multimeter and check whether they match the specified ones in the ups manual. aslo with some ups there are switches that you use to set the input voltages or number of phases in the ups input. check the manual to see whetther your ups has such.
Posted on Oct 25, 2009
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