Ultimate stereo nightmare


I have a complex stereo system, having accumulated many various components through the years. I also have an impenetrable jumble of wires.  Until now I’ve been able to deal with problems that arose. Now that I am elderly I can’t easily get down on the floor to assess things. I bought and installed new very expensive speaker cables (Audioquest Robin Hood), and subsequently found that my right channel was not working. After switching cables, the right channel was still not working. So the problem is somewhere in the system.  I don’t know if it’s a loose cable or something else and have no way of tackling the jungle of wires to check it out. 
I hired a company that claims they deal with these things, but there’s such complexity I don’t know whether they can deal with it.
 

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in our lifetimes of being audiophiles and music lovers, it is important to know when to simplify, move towards one box solutions

good luck on your troubleshooting

I am very empathetic. Being an engineer with OCD this has caused me to be obsessive with cable management. Makes issues like yours much easier to manage.

I wish you luck.

1. The first thing I do is turn off amp & preamp and swap the amp phono cables at either end. Now listen again. If the problem stays in the right speaker its not the preamp

2. grit your teeth and swap the speaker leads at the amp. Now the amp L channel is driving the R speaker and vice versa. If the R speaker is still out its the speaker or the R speaker cable. If the L speaker is out its the amp R channel.