It sounds like you're having trouble with the Yamaha update process. The error codes you mentioned, 10000 and 40000, often indicate issues with the update installation. Since you've tried updating via USB and encountered a new error, it might be worth contacting Yamaha support for assistance. They might have specific troubleshooting steps to help resolve the update issue without resorting to a factory reset. It's always best to reach out to the seller for guidance in situations like this to avoid any potential risks to the device.