Hey all ! looking for some help on this one. I have a hunch it may be a bad output transistor on this beautiful piece. The front two channels work great in 2/4 mode/ 4 channel mode works great front and rear too but when engaged the rear left channel doesnt work at all. The power meter only starts moving when I really crank up the volume and the sound output sounds terrible on that channel ( more so only outputs when I turn up the bass and just gives off a crackle / popping noise ) I have cleaned all the contacts and checked all of the solder joints which look as they should. This makes me come to the assumption of it having a bad output transistor for the left rear channel.. any thoughts ? Does anyone know which output transistors go to the left rear channel so I dont have to test and take out each one ? pictures would greatly help. Thank you !