Back-UPS 550VA Not Working Properly

[BillP]

I recently purchased this UPS and it worked fine when plugged into another PC, but I had to unplug from that PC and plug into another. Once I got everything in place and turned on the UPS with the workstation it instantly makes a loud beep noise and the red light next to Battery flashes, so I turned it off. I realized that there was a lot of devices plugged into the UPS so I unplugged two of the devices but it did the same thing it previously did, so I turned it off again. I unplugged everything from the UPS and it turned on fine with the green light on. I tried plugging in one device to the back up outlets on the ups and the light stayed green on the ups but there was no power going to the device I had plugged in, but if I unplugged from the back up outlet on the ups to the surge protection only outlet then there was power going to the device. Im not sure what I should do. I know I overloaded the UPS to begin with but am not sure why none of the back up outlets on the ups are giving power but the surge protection outlets on the same unit are?

[BillP · Accepted solution]

let's try this. can you turn it off, remove the plug from the wall, and then disconnect the battery connections? with the battery disconnected, let's hold the power button down for about 10 seconds to completely reset the unit. then, let's reconnect the battery, reconnect the UPS to the wall, and turn the UPS back on with nothing connected and let it run through its self test. (I just learned myself that this model of UPS can only detect an overload when it is running battery actually). then, let's plug one thing in (maybe something simple like a lamp or radio) and see if it is getting power just to verify it can still output power on the battery back up outlets after the reset. if the battery back up outlets still do not output power at this point, then i think we may have an issue/fault here.