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Introduction

Replacing the USB cable requires a near-total breakdown of the soundbar, so we only recommend it as a last resort.

What you need

Use a Jimmy to peel off the screen stuck to the front of the speaker.
Start from any corner and use the Jimmy to get under the screen. Once one side lifts up, you can use your fingers to peel the rest off.
Be careful to avoid damage to the rest of the speaker and especially to yourself.
Don't worry if it tears; use the Jimmy again to peel off the rest.

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Lift the front panel off of the rest of the device.
The speakers will still be attached to the front panel. Being too rough could damage them.
Remove the 4 mm screws from the speakers using a JIS #1 screwdriver.
Remove the front panel from the device.

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Follow the three wires connected to the speaker to find where they connect to the circuit board.
Use tweezers to gently rock the end of the wires back and forth until they disconnect from the board.

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Depending on where the soundbar is damaged, there are two different ways to remove the USB cable. This guide will cover both scenarios.
Remove the 6 mm screws connecting the circuit board to the rear panel using a Phillips #1 screwdriver.

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If the small wires coming from the USB cable are disconnected from the board, you'll have to solder them on. We recommend not letting that happen if you can help it.
The small wires may be glued to the circuit board. Pry off the glue with the Halberd Spudger.

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Follow this step if the wires are still connected. If they aren't, skip to the next step.
If the wiring to the circuit board seems fine, use a razor or wire strippers to clear the rubber insulation away from the USB.
Keep track of the colors! If you connect the wrong wires together, the speaker won't work, and you could ruin the board!
After removing the rubber insulation from the smaller wires, remove the access USB.
Splice in the new USB and wrap the connection with the colored wires in electrical tape.
If you end up with reduced sound quality, you may need to solder after all. Continue to the next step in that case.

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Follow this step if the wires are not connected.
Remove the old USB wiring as best as possible from the circuit board.
Try to not be too rough. If needed, use wire strippers to remove the wires.
Remember the locations of the color coded USB wires and solder each into their respective places.
Take your time. Do not add too much solder; you could potentially fry the board if you do.