Yes the is light on the adapter they I connect.Did you see flashing Link LED on USB device???
I was try that..before there was keyboard problem but I was put new keyboard...so maybe there still keyboard problemCheck if machine is detected in DFU mode.
yes there is no activity just steady light.Light on means steady light?
noIs now detected in DFU?
the same.Try the board disconnecting keyboard/trackpad.
no, without.J6600 connects with audio flex and board.
no liquid sign at all!Did you check all for liquid signs???