Question Dell XPS power supply only works in a Dell computer?

Dec 23, 2019
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Got a 400w Dell power supply I'm trying to put in a new build but doesn't power on when jumped, only turns on in the Dell computer it came out of. Is there something I'm missing?
 
Dec 23, 2019
2
0
10
It's a Lenovo m92p i5 3550. And yeah everything works with the power supply it came with and also another Dell power supply but it's to small for what I need so I want to put the 400w in it but doesn't power on. I tried jumping it with the green and black wires but nothing. I put it in 2 different dells and it works perfectly fine