Precision T3500 Wont power on

Hi. So I'm working on a friends Precision T3500 and when its plugged in the green 1,2,3 and 4 lights stay solid green on the front panel. When I push the test button on the back of the power supply the fans come on but as soon as I let go of the button they shut off. There are also know beeps during any of this. I have tried another new power supply and get the same results. I think everything is fried as their house got hit with a lightning surge and some other electronics died as well. Any thought? Thanks.