Restart your Kindle to resolve intermittent issues such as a frozen screen or slow performance. Press and hold the power button until either a power dialog box appears or the screen goes blank. Continue holding the power button for 40 seconds, then release.
Furthermore, does Kindle Paperwhite go into sleep mode?
The Kindle Paperwhite uses its battery power only for page turns, so there’s no difference in battery usage between putting the device in Sleep mode and turning it off. … (The device goes into Sleep mode automatically after ten minutes of inactivity.)
Regarding this, how do I get my Kindle Paperwhite out of sleep mode? If you want to disable sleep mode on Kindles just type ~ds into the Kindle’s search bar and hit enter. Doing so will make it so the Kindle will not go to sleep at all. The power button won’t turn it off and neither will using a sleepcover.