Upon further troubleshooting we found Q604 had a small bubble on it and upon checking it it was shorted. This is a NPN general purpose transistor X72A, upon research found the actual part number which is BCW72LTIG or SBCW72LTIG. Board part numbers affected by this are:  EBT62753701, EBT62753601, EBT62394255, EBT62753702, CRB34549401 all used for the 60PN5000 LG plasma panel. Also if I recall the same type of circuit is used on the 50PN4500 with board numbers EBR62394289, EBU62004601, EBT62394225.