Original post by: Chris Opperwall ,
I looked around the PlayStation forums for anything on two red lights after a YLOD reflow. The only solution I could find was making sure that each component was correctly connected after reassembly. Someone on the forum said that they hadn't reconnected one of the daughterboards correctly and that doing so fixed the double red light error. I'll keep looking for other solutions, but checking all the component connections should be a good first step for solving the problem.