Is my NS 1350 dead now?

[Anonymous user]

I was gifted an NS-1350 recently. It had been sitting for quite awhile, not plugged in. When I plugged it in the battery showed at zero. It did turn on, I was able to cycle through the screens, etc. While it was plugged in I connected some equipment to it (PC, monitor, etc.). Then I plugged an LED work light into the adjoining wall socket. For some reason this tripped the breaker. I reset the breaker but now the UPS won't turn on. I've pressed the reset on the back many times but it refuses to power up.

Why would a tripped breaker do this? Is there any way for me to recover, get the UPS working?