Chosen Solution
have had this problem before a few months ago and go it to start up. power cord is ok. checked all the blogs and still cannot get laptop to turn on. any more suggestions??
There are clear instructions at this link on how to open up your machine. MacBook Pro 15" Unibody Mid 2012 I would suggest starting with removing one ram stick and trying to boot again. if that fails swap them and see if it boots. If not then there is a problem somewhere else in the motherboard most likely.
