To facilitate repair and testing, we've turned the heat-sink/IPM module on its side, added another heat-sink on top for external FETs, and temporarily mounted this to the Y sustain board. During testing, we encountered a failure (visible short on die) in one FET on the remaining healthy IPM module. We are now hand wiring high power discrete FETs (two seen on the left in this photo) taken from the other TV externally to substitute for the on-module devices. In one test, we experienced a very loud and spark-filled explosive failure destroying the remaining on-board FETs, some surface mount resistors, and the external FETs. We've rebuilt this assembly with the other IPM module and additional high power FETs; test results shortly....
