Schematics for the main board needed please. Sticker on board states BN94-07517A but the silkscreen says BN41-02157B. Cant find here or anywhere on the web.

Backlights work when main boards disconnected. When connected and power button switched, the relay on the PSU board turns on for one second then back off.
While relay is on, all voltage rails are present and steady (scoped) on main board.
I love a good logic puzzle but getting lost without any schematics.
No shorts on ANY capacitor main board.
Thermal camera shows 3.3V inductor getting warm instantly but...

Hey guys from Hamilton Ontario Canada.
Actively teaching myself macbook repairs in my shop.
Thanks for having me.