Also FYI RSOD NEVER has anything to do with reflow. Hardware errors are all light errors. RSOD is HDD, HDMI, or SixAxis (Sony or knockoff with ID of controller made before DS3). I learned this stuff on my own with my own money on my own time, you won't see it in any $40 manual.
Light error is hardware or firmware error guaranteed. RSOD has to do with data integrity basically. Learning Sony RSODs a console if there isn't a controller with a DS3 dated firmware ID costed me around $200. It's free to you all.