The Product Cannot Be Charged - Yamaha EP-E50A User Manual

Troubleshooting > The product cannot be charged

The product cannot be charged

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Your computer is not turned on (when charging from your computer).
Turn the power of your computer on, and then charge this product.
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You may have been using a USB power cable other than the one included with this product.
Use the included USB power cable to make sure the product correctly charges.
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