Introduction
Wire connections broken in the motherboard. Blown fuses in the circuit terminals.
What you need
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Place the speaker with its front side facing down.
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Use a Phillips #0 screwdriver to remove the two 25 mm screws from the left and right sides of the battery cartridges.
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Open both lids to the battery cartridges.
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Almost done!
To reassemble your device, follow these instructions in reverse order.
Conclusion
To reassemble your device, follow these instructions in reverse order.