@gsuberland AFAIK there was a materials problem with solder joint reliability that caused Red Ring of Death. Or, if it was a capacitor problem, the caps were on the BGA itself and not on the motherboard.
This is based what people were oddly quiet about, and who was quiet.
@trollball @gsuberland https://youtu.be/z2d6IMBS8oY?t=1148
this is publicly confirmed as the root cause for the high rate of RROD in early xbox360's