Our tutorial shows you why your Kindle Frozen on lock screen, and we hope that it is a permanent fix. For more info just Dial our helpline number to get in touch with our experts.
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If you're facing an unresponsive screen issue with your Kindle Paperwhite, you can try the following steps to fix it:

Restart your Kindle Paperwhite: Press and hold the power button for about 40 seconds, and release it when the screen turns black. Then press the power button again to turn on your Kindle.

Charge your Kindle: Connect your Kindle to a power source and let it charge for a few hours. A low battery can cause the device to be unresponsive.

Check for software updates: Make sure your Kindle is running the latest software version. Go to the Settings menu, select "Device Options," and then select "System Updates."

Reset your Kindle: If the above steps don't work, you can try resetting your Kindle to its factory settings. Go to the Settings menu, select "Device Options," and then select "Reset to Factory Defaults."

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Peter