So, I have an MacBook Pro (mid 2010) running Big Sur with opencore patcher, and it just won’t turn on anymore after I opened the back side once.

I plugged and unplugged every cable I could see on the mainboard. And also changed that hard drive once.

When I plug in the charger, the light on the MagSafe connector turns on, but the MacBook still won’t turn on.

Any ideas? My google searches didn’t bring up anything helpful.

Thanks.