I purchased an APC Smart UPS 1400 (Part # SU1400RMX93) for not too much money. Now my task is to figure out how it works and if it needs repair. Since I have no user manual to begin with, I have to start at square one because I do not not know what all the lights and switches, etc. stand for and do. First, does anyone know where to get a user manual? Second, When I plug it in and plug the computer into the back of it the computer should come on. It does not. Even if the unit does not presently function, should there not be a pass through for power? Thanks for your time.