ericambrose32, first you do need to remember that this will only work id your YLOD is caused by solder fractures and if they are not to extreme. Reflowing any board with a heatgun is not an exact science and as such does have a certain amount of failure. The proper fix for this would most likely be a professional reball. Anyhow, the biggest reason for failure to reflow is not enough consistant heat. There is a fine line between reflowing and absolutely melting the solder, so one needs to be aggressive without going over board. If nothing else, get a couple of temperature probes and see what heat you generate. Looks at your previous question about the temperature ranges. Right now it seems you got not much to loose since it is not working anyhow. Follow the guide from here and keep on trying. If at first you don't succeed....:). hope this helps, good luck.
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