Morning - I had the pleasure of local AK'er Greg stopping by to look at my amp yesterday. There's been a left channel drop out for a while. Been intermittent and so we decided to lug the beast off the shelf and go after it. Greg is well versed, search for 2205 love thread. He came over with new set of caps and his kit. We cleaned and worked the rear switches thoroughly. Replaced the caps on the driver boards. Checked all the solders, cleaned the pins, lubed and cleaned the spades to relay. It was a great experience watching Gregory work on the boards. Unfortunately, the problem persists and I am in need of a new relay. I'll call McIntosh later today - and appreciate suggestions for supplier. I need to do the power guard bulbs too, so more to come.