Today I disconnected the 861 from my system and opened it up to verify how many TM00 cards I have.
Two are installed as required, but the left card is installed between the IA10 and IA00. The left most connection is blocked by two capacitors on the IA10 card.
I thought I would remove the ID25 card that I am not using, and move the two analog cards over allowing room for the TM00.
When I removed the IA00 card I noticed a black burn mark on the back of the circuit board. I was surprised but glad to see something that finally makes sense for the cause of the problem.
Now to find a replacement for the IA00 card. It will only be used for connecting the sound meter, as I don't have any analog sources. What is the least expensive analog card that will work?
Thanks to everyone that provided ideas and suggestions to track down the problem.
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