How can I get my tablet to start operating again?

Press and holding down the power button for 20 seconds or more. Then turn the device back on by hitting the power button again. If this doesn't work the first time, you can try holding the button down for 30 seconds or more. Most of the time, this will be all you have to do to make the Kindle Fire work again.Oct. 11, 2014

SOLVED: My kindle won't turn on. Is it the battery? - Kindle ...

How to Fix a Kindle Fire That Won't Turn On - Lifewire

www.lifewire.com > kindle-fire-wont-turn-on-or-charg...

May 26, 2020 - Perform a soft reset. A soft reset resolves many common issues without affecting any data on the device. Press and hold the Power button for 40 seconds, then release. The charge indicator light should turn on after several seconds, and then the Kindle Fire should reboot.

Amazon Fire Won't Start - Technipages

www.technipages.com > amazon-fire-wont-start

Fix an Amazon Fire that Won't Start. Hold Power Button. Ensure that you are holding down the "Power" button for at least 5 seconds to power it on normally. Charge Using AC Adapter. Ensure that the Amazon Fire has a charged battery. Hold "Volume Down" While Powering On. Restore Latest Software.

VIDEOS

https://www.google.com/search?q=Kindle+Fire+won%27t+turn+on

..

Hold down the 'on' button until it shuts down. Continue to hold it down for 40 seconds, then press it again to start up. This will reboot the kindle.

Many people say to push and hold down the Volume(+) and Power button at the same time. Push and hold for as long as twenty seconds until you see a green android with green text.

But, on some devices and some Android O/S versions it takes pushing and holding the Volume(-) and Power button and holding them both down for twenty seconds or so or until you see the green Android and text screen. This will show the Wipe Data/Factory reset option. Select this option by scrolling using the Volume(+) button and engage using the power button. Some devices give you a second screen with a list of *no no no no no* and one line of Factory Reset. Again, scroll to the Reset option using the Volume(+) option and select it using the power button.

If the above doesn't work, either your battery is dead or your device is dead.

You have to reset your tab its at the back of your tablet .or you may go nearest service provider to unlock it.if is not working go to unlock account enter your user name then choose pattern enter your new pattern and then enter it again for confirmation..or u shut down the device then hold the power button hold again the volume up and the power button together.you see the recovery mode scroll down the with volume down button press the factory settings using the power button..then press the power button again to reboot make sure your battery is fully charge.

Press and hold the reset button for 40 seconds and then press again.

Since I don't know which exact Proscan Tablet you have, here is how to restore the PLT9045K.
1) Make sure the tablet is powered down.
2) Press and hold VOLUME UP(+) and DOWN(-) buttons, plus POWER button all at the same time.
3) Insert a metal pin in the RESET hole at the back of the tablet, then push and hold it for 2 seconds, while still holding the VOLUME and POWER buttons. Make sure the pin is pushed. It seems like nothing happened, but just keep on going to the next step.
4) Power ON the tablet and immediately, PRESS and RELEASE continuously the VOLUME UP(+) button in order to get the display as showing dead tablet (dead robot).
5) This is the critical part. Make sure you do the right sequence or you will start again from the beginning. Press and hold the POWER button, then press and release VOLUME UP(+), and the display will give you a screen showing different options.
6) Choose the option wipe data/factory reset, by clicking POWER button to scroll down. To execute the selected option, press VOLUME UP(+) button. The tablet will reboot back to its factory setting.

You will need to do a factory reset:

1) Make sure the tablet is powered down.
2) Press and hold VOLUME UP(+) and DOWN(-) buttons, plus POWER button all at the same time.
3) Insert a metal pin in the RESET hole at the back of the tablet, then push and hold it for 2 seconds, while still holding the VOLUME and POWER buttons. Make sure the pin is pushed. It seems like nothing happened, but just keep on going to the next step.
4) Power ON the tablet and immediately, PRESS and RELEASE continuously the VOLUME UP(+) button in order to get the display as showing dead tablet (dead robot).
5) This is the critical part. Make sure you do the right sequence or you will start again from the beginning. Press and hold the POWER button, then press and release VOLUME UP(+), and the display will give you a screen showing different options.
6) Choose the option wipe data/factory reset, by clicking POWER button to scroll down. To execute the selected option, press VOLUME UP(+) button. The tablet will reboot back to its factory setting.

Sounds like you are caught in a Bootloop for some reaso. Press and hold the Power Button for 40 seconds, release. Then plug the device in a charger, let charge for 4 hours while powered down. Unplug the device from the charger:
Step1 : Press and hold the Power Button for 30 seconds, then release the power button.
Step 2: Press the power button for 1 second, release and press the power button again, release.
Step 3: Is the device booting normally? If no, contact the manufacture for a replacment.

Every tablet has a button sequence, the reason being for a fresh restart. Either you unplugged it before full recharge, or didn't use proper charging adapter or cable.
There is a solution to avoiding this but first get tablet started by:
Hold power button and volume up button for eight seconds, release and hold power button again, tablet should turn on.
If not, do the opposite hold power button, volume down for eight seconds, then power button. You need to do this with proper adapter and charger you tablet came with plugged in. You may also need to do this more than once.
Once your tablet has started up, the way to avoid this is to swipe right on screen until you see settings app, should be round looking similar to a sprocket, or clock gear.
Open settings / display / sleep. I set mine for 30 mins.
Now you no longer need to power off you tablet manually, thus skipping the button sequence process.After unplugging from charge adapter you will still need to press power button to start.
Hope this helps I have yet to have this problem again, and remember to always let your tablet fully charge before disconnecting.