I have an APC UPS (model SUA1500i) that will no longer switch on. No lights come on; the unit seems totally dead.
I cannot remember when the UPS was last used but has been no longer than a year. The UPS worked fine when it was last used. The UPS is probably over 3-4 years old, but has not had heavy use having only serviced a single PC (I know, overspecified).
I have tried changing the input power cable but to no avail. The behaviour is the same whether the PC is connected to the UPS or not. I have also tried pressing what I think is the breaker button at the back of the unit but again nothing.
Could this be a battery issue? Does anyone think it is worth placing the battery?