hello friends
pls i need help i have a macbok pro a2338 it haved water attack and i repaire all now the mac is working well but i have a problem when i plug the back cover i cant get start up i must disconnect the battery and i get start when i plug the back cover agine when shutdown the mac cant start agine i must to unplug and plug the battery to get start if i dont plug the mac back cover it work normal i dont know if have a sensor problem pls i need help

if it was water, then i clean bad, microscope and check everithing again,

thank you for replay
yes its a water and i clened evrything well by microscope . but the problem not fixed when the battery conected and plug the back cover cant start must desconnect the battery to reset and it be start but if i dont plug the back cover all is ok

Inspect carefully flexible cables that may touch the bottom cover and have insulation damage? In particular, the touch id button cable
And attach a photo without a cover, in good quality