fill me in? as I recall you blow 3-outputs? Was their any burn marks on the Transistors? or silicone pads or chasey? and did you mark were they came out of ? and is that related to were the open resistors you found? I think your on the right track you could have blow some of the resistors when the Transistors blow, You might want to look at that area out (most of the time the resistors will have a crack in them and Open up , like you found out) if open you will have to replace them.
Also look for open traces and other components in that area (or the whole left back channel ) I would start their and test the Bias Transistor also Good Luck
