Hi, I have a water damaged macbook pro 15". The problem being it will not turn on. It works if I remove the battery and then plug it all back in to the mag power cable etc and turn back on. If I ever shutdown the laptop completely I have to remove the battery motherboard connector and repeat the process to get it to power back on. Putting the laptop into sleep mode is fine - and it will always power back up. I have removed the motherboard to take a look for visible signs of damage and i have spotted a couple of odd marks on the silver plating where the screws holding the motherboard to the case sit on , please see the pictures below: There must be some grounding problem somewhere on this board - which is why the process mentioned above allows the laptop to boot again and behave as it always did - but I am struggling to see what to do about it - and how to potentially fix it. The board is off no value to me in its current state hence opening and taking a look - and I am happy to try any suggestions on possible fixes - please suggest anything!