Why does my tablet keep powering off and on?

• Connect your tablet to a power source in the wall by using the wall charger and cable.
• Wait for 10 minutes to make sure that the tablet has gained enough power to start.
• Press and hold the volume down and the power buttons simultaneously for about least 10 to 15 seconds.
• Try to disconnect the battery . This is a common issue with tablets and it can mostly be solved by just disconnecting the battery for a 5 minutes. Or the battery has gone bad and needs to be replaced.

Try and hold power for 10 seconds

Check the display settings and the power settings.
The display.
You can set for 5 minutes the default is usually 30 seconds.
The power settings.
Make sure it is not in savings mode an turns off the display very quickly.
Some battery savers reset the display.
Even other programs will reset things you had no idea.
Remember to read the information packet before loading apps.
Good luck these are the most common Tablet issues.

Try logging out from Facebook from inside PPS, do a restart on the iPad (hold down Home and Power button together for 10 seconds) then start PPS and connect to FB. If that doesn't work, delete the game and reinstall it. (This is standard troubleshooting for most apps)

try a hard reset - but you will lose all your data
How To Unlock the password screen on Insignia Flex 10 1 Tablet

Hold the power button down for 30 seconds. The tablet will shut down completely. Wait 1 minute then turn back on.

I had same issue, it is some sort of glitch in either the mfg or the software. Keep trying but try not to be to forceful with the buttons. I sometimes have to push it over 30 times to get a result. a lot of the time i will just plug it in walk away and they come back about 5 or 10 minutes later and try again. Try different button sequences. Hold down power for 30 seconds remove and add your external SD cards. Hold power and push vol down. Hold power and push vol up. various sequences with plugging in charger as well. I know it is very frustrating but try not to lose your temper with it. Good luck.

If your kindle are frozen and won't turn off so, firstly reboot your kindle this is done by pressing the side button minimum 20 to 40 second and screen are blinking so, give the kindle about one minute to start backup.
What to do when Kindle Stuck on the Start screen

samsung galaxy 10 2.1 keeps rebooting and rebooting automatically. Displays going into power saving mode and reboots. stays on for aobut 10 seconds and then shuts down. Will not take a hard reboot. Help

unplug charger and remove main battery, press power button and hold for 30 seconds and release, let laptop sit for 5 minutes, reseat battery and plug in charger and press power, a long shot.