See this:
https://www.amazon.com/gp/help/custo...deId=202048000
Quote:
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The most recent software update for some Kindle e-readers provides updates needed to continue using some services on your device. This update should automatically download and install when your Kindle is charging and connected to a Wi-Fi network. If it doesn't, you may need to manually install the update to regain access to these features.
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Edit: Not sure about your menu access issue. Can you access the usb storage? If so, try downloading the latest firmware, copy it to the root of the usb storage and reboot the kindle (press and hold the power button for 40 seconds if you still can't access the menu).