Radiation therapy kills cancer cells by damaging their DNA (the molecules inside cells that carry genetic information and pass it from one generation to the next) (1). Radiation therapy can either damage DNA directly or create charged particles (free radicals) within the cells that can in turn damage the DNA.
Locate the power switch. The switch is located  on the top side of your Kindle beside the headphone jack. Hold your Kindle in your hands, place your finger over the switch and slide it to the right. To turn off your Kindle, slide the switch to the right and hold it there for a few seconds until the screen turns blank. Then, release the switch. Step. Wake up your Kindle. The power button does more than just turn on your Kindle. It also wakes up the machine if it has gone to sleep. If it is time to wake up your Kindle, slide the power switch over and release it. If you want to put it down for a nap, simply slide the power switch again and release quickly.
1 To turn the Kindle Fire on, press and hold the button for about 2 seconds and the screen should light up. 2  To turn the Kindle Fire off, press and hold the Power button for about 2 seconds until a prompt appears on the screen.