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  • superuser.com/questions/1306951/… this is a 3000 VA variant of the same UPS. It seems like the first test CANNOT be done
    – oierlauzi
    Commented Jun 30, 2019 at 21:26
  • The UPS can be used with a computer, among other things, but troubleshooting or servicing it isn't a computer hardware or software question.
    – fixer1234
    Commented Jun 30, 2019 at 23:36
  • Most UPSes are designed to power on and deliver utility power in the absence of working batteries. I submit as evidence that UPSes can report dead or failing batteries, something only possible if they can operate with dead or failing batteries. Thus I would be suspicious the UPS's failure is not due to the batteries.
    – I say Reinstate Monica
    Commented Jul 1, 2019 at 0:06
  • @TwistyImpersonator. I've tested my current UPS pulling out it's battery and above mentioned behavior occurs. Although it keeps running if the batteries were pulled out while powered on, it refuses to turn after a reboot.
    – oierlauzi
    Commented Jul 1, 2019 at 14:51