Hello, I'm trying to repair the A1278 unibody MBP 13", I believe either 2010 or 2011. I am having an issue where the device will not turn on (no screen light-up, no hard drive whirring, no speaker feedback, etc) and the Magsafe charger shows a green light at all times.

Based on my research I saw that this could be a problem with the DC in board, so I disassembled the entire thing, replaced it with a working one, and reassembled.

Unfortunately the laptop is still screwed and has the same behavior after replacing the DC in component. Any tips on what part needs replacing? Is it the whole logic board?

Edit: also wanted to mention i have tried starting the laptop both with and without the battery connected; neither allows it to start up.