Pulsar evolution 3000 xl. no power

Check the big white battery power connector to make sure the metal tabs are making a connection to the female connection when pluging in the battery to the ups. If the tabs are not aligned the battery is not making a connection to the ups and will not engage the relays in the unit. Again check the metal cennections in the male connector to make sure the flat tab is aligned with the female plug when connecting the plugs together. I could not get my ups to power up and the reason was because when I connected the battery the tabs in the plugs were not making a connection and the ups was not getting the voltage from the battery that it needed to power up the relays. I checked everything in the ups and then I looked closer at the battery connector to make sure the ups was getting the power form the battery and it was not electricaly connected to the ups because of the large white conector tabs were not aligned to connect to each other.

Flag board and control board(zogh) may damage . Replace both card to solve the problem.