I worded things poorly — I hadn’t read the forum rules carefully. Sorry about that.

These rules are a bit confusing

Sounds like a classic power-switch issue through the function selector. On many Magnavox consoles the “Phono” position routes power through the changer switch, so if that leaf switch or its wiring opens up, the amp goes dead only on Phono. Testing the tuner/amp live on the bench without disconnectin...