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I have a digital piano Kawai ES8. But it doesn’t work. It doesn’t turn on. When I press and hold the POWER button piano doesn’t turn on, but LCD display work. I gave the piano to the service center and they told me that firmware is broken. What would You advise me?

Hi, Couldn’t or wouldn’t the service centre fix it? You could always try updating the firmware and see if that works. Here’s the latest ES8_v108.zip firmware and here is how to install it. Not sure if it will work or not but you can only try.