it doesn't power on after screwing the logic board.

I replaced the key board and connected all connectors without screwing things, put the lower case and turned on. It worked fine. But after screwing all things, it doesn't power on.

I unscrewed the logic board and put it back, then connected all and tried. It worked fine sometimes but not every time.

I'm doubting that this is caused by the metal plate next to mag safe or below connectors that maybe getting GND. Or small pins on the logic board that may be detecting if the lower case is closed. I'm sure it was closed even not screwed tho.

Any advice?