That was my thought. They got really hot, really fast with only 12v. I am in process of removing the regulators. I have already removed the left one and the middle one, but still have one more to remove. I just have to remove the LM-317HV. Hopefully that is where the problem is. Once i remove it, there should be no connection between the 5v pad and the neg terminal... I believe, if it is the problem. If not then i am in trouble, because i have no idea where to go from there.

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