I have a Macbook Pro Mid 2012 2.5 GHz core i5 running mountain lion that had soda spilled on the key board I have no idea how much or for how long When I try to boot it shows the apple logo and shuts down If I continually hold the shift or the control key it will boot one to safe boot the other normal boot. I can perform some functions but when I release the key it will proceed to shut down. I stripped the thing down cleaned the mother board with Isopropyl and replaced the key board and backlite new but the symptoms are the same. Any help on this would be greatly appreciated I have searched inside this forum but drawing a blank. Apple Hardware Test shows 4SNS/1/40000000;VCOC-3.196???