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Repair and disassembly information for Sony WH-1000XM4 wireless noise-cancelling over-ear headphones.

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Fixed always-on power button but now left side doesn't work

Had a problem with the power button being permanently activated (would switch on/off constantly, pairing bluetooth).

Opened it up, separated the power board strip from the plastic and reattached (moisture between the plastic and power board strip was apparently the problem).

But when I put it back together, the left side can no longer works. Tried factory reset, didn't do anything.

While I was repairing the power button issue, I accidentally dropped a screw into the magnetized middle of one of the cups (the right side though, which still works?)

Also had my screwdriver touch the magnetized part. The power ribbon cable was disconnected at the time. Not sure if it could have been that. Anyone else had a similar problem?

EDIT: Found the problem, the green and orange wires that connect the main board to the can have disconnected. But they're so short that I'm not sure how I would be able to successfully reconnect them (with a soldering iron? where exactly would I connect them to, the silver balls?) Wondering if anyone has any advice?

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I have not, but it sounds like some retracing of steps is in order. Add in some pictures to your original post so we can see what you're looking at!

par

@flannelist

Followed your suggestion to backtrack and noticed that the wires connecting the main board to the left can had come loose (included pictures and additional questions in main post).

Seems really tricky to reconnect them due to the length of the wires? Not sure where to go from here!

par

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You may be able to pull that cable out a little, but there may be a clamp on it. The other issue is to get the wires back on the right solder spot (outside spots). If they are reversed the 2 sides will be out of phase. You may have to experiment with this.

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