Replaced MacBook 12 Logicboard and wont turn on

Hi, recently bought a Macbook 12 Retina (2015) logicboard, (not from ifixit), however, I did follow their intuitive guide to replace the board. I successfully replaced my prior logicboard which kept giving a kernel panic and was not repairable. However, my bad logicboard would still power on/off, but inevitably turn off.

I just replaced the logicboard (has better SSD card) but now it won’t even power on AT ALL. Doesn’t get hot, doesn’t even make a sound, completely nothing. I tried reseating everything three times included all the cables and nothing is working. I even tried inserting my prior logicboard and that didn’t even power on anymore. Now I’m thinking it’s the ribbon cables, but how would this affect my macbook from powering on/off? The battery light (when opened up) gives an LED signal that it’s on - but won’t power on.

I did very VERY slightly rip one of the trackpad ribbon cables , (and was going to replace) but this shouldn’t have an effect on the macbook turning on?

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The cable also carries the power switch signal with the keyboard.

You'll need to replace the cable before you can move forward.

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