PC wont start up after new PSU

Mar 8, 2018
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Please help I swaped my old PSU with brand new Corsair VS550 and I coneccted all cables, after I turn on the PSU motherboard lights but when I press power button on my case nothing happens. What shoul I do to fix this problem?
 
Solution
Either you got a bad power supply, don't have the cables pluged in right, or knocked something loose on the board.
Changing the PSU by itself will not make your PC not boot.

King_V

Illustrious
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As someone who's been tinkering with computers for about 20 years, I would suggest first thing to make sure that the 24-pin connector to the MB is completely seated. I say this because I had those exact same symptoms happen to me for that very reason.

Last month.

Quite embarrassed, I was.