CyberPower UPS failed?

[Sarra]

I've got an older, but not that old, CyberPower 1500AVR. My storage/general use workstation/server is plugged into this UPS, along with 3 monitors. I have all of my networking equipment plugged into a separate UPS. My gaming/editing PC is plugged into a third UPS. All are on separate circuits (my house was built by an electrical engineer in the 1970's, and the copper in the walls is shockingly overbuilt).

 

So, we had a weird day today. Power went out at the office I work at, but it didn't go out at home.

 

I get home, and one machine and all of it's monitors are off, the UPS is freaking out, the other two UPS units are absolutely fine, happily running without issue.

 

So, I power cycle the UPS that's freaking out. Power button off, power button on, turn on workstation. No problems.

 

I go into the UPS' software, and initialize a self test: Unit completely freaks out, constant buzz, the overload light is on constantly.

 

I give it a minute, reset again, and try the self test again, same result.

 

I'm currently looking at the PowerPanel program, and I'm seeing a 35-45watt load on the UPS, which is 5-6% load...

 

I'm trying to determine if the unit is toast, or if there's another way to reset it to test it. I have no problem replacing the unit, but I would prefer to not throw away a good piece of equipment if I can help it. If it's bad, and I doubt the battery itself is the problem, though, I will just replace it.

 

I goggled the self test power off, but nothing relevant comes up. The unit doesn't even record that it attempted to self-test... It just shuts off. The battery works just fine, if I unplug it, and if I run up a higher load, it's fine. I'm not sure what initiated the first failure, but everything was off when I got home, and neither of my other units reported even having to run on battery power. So, I'm confused... We had a wind storm and now a mild, and distant, thunderstorm, so I'm worried that there was potentially a voltage spike that damaged the unit. It's old, though, and it protected my workstation, so I'm not complaining, just trying to fix this if possible.