so i turned off the UPS and went to check the circuit breaker, so enough it had tripped.
so i reset the breaker, tested the sockets with a circuit tester, all was good, then plugged the UPS into a different socket, unplugged the PC and monitor from UPS, powered the UPS back on and sure enough the alarm went crazy, only this time the UPS let go of it's magic smoke and sparked pretty freaking good as well !
i do have a spare UPS and am back up and running, but i wonder what could have happened if i was not here, i wonder if it could have burnt my house down

thank goodness for circuit breakers, i did have a new breaker box installed a few years ago.
the one that blewup looks like this one here, but is a NS1250.......
http://www.walmart.com/ip/APC-Power-Sav ... G/15105336