I'm just not convinced that the space heater will actually cure the problem. RoHS lead-free solder melts at 422* F... I can tell you that my space heater does not get anywhere near that hot, and even if it did, to get the motherboard hot enough to reflow the solder in that area would incinerate everything else in the case. The physics behind the space heater trick just don't make sense. I have tried the "towel trick" with my xbox 360 for the same BGA issue and it just makes it worse, and that sucker gets HOT.

My heat gun, on low, will blow hot air at 482*, plenty hot to reflow the solder. I will try that first since I can get localized heat and not worry about damaging other components, even if I do end up with a warped logic board.