How long should itr take to reboot a tablet - Tablets & eReaders

To unlock the bootloader on your Lenovo Tab3 7 Essential (TB3-710I) tablet, you need to follow these steps:
Note: Unlocking the bootloader will erase all data on your device. Make sure to backup your important data before proceeding.

1. Enable Developer Options on your device. To do this, go to Settings > About tablet > tap the Build number 7 times.
2. Enable USB Debugging. To do this, go to Settings > Developer options > enable USB debugging.
3. Download and install the ADB and Fastboot tools on your computer.
4. Connect your tablet to your computer using a USB cable.
5. Open a command prompt window on your computer.
6. In the command prompt window, type the following command and press Enter: adb reboot bootloader, This will reboot your tablet into the bootloader mode.
7. Next, type the following command and press Enter: fastboot oem unlock, This will unlock the bootloader on your tablet.
8. Once the process is complete, reboot your tablet by typing the following command and pressing Enter: fastboot reboot. That's it! Your Lenovo Tab3 7 Essential tablet's bootloader is now unlocked.

replace the on/off button and it will reboot no problems

there are many reasons, why this happens, try this instead, if this will help. boot to recovery, depending on your tablet, for android, turn off your tablet, then while turned off, press volume up and power same time till you see your tablets logo, wait until it opens recovery, then select wipe data/factory reset. this will bring back the tablet to its original state or factory default settings, after a wipe, select reboot system, the tablet will turn on again, loading the settings like the first time you bought it, and see if that helps.

Unfortunately you cannot do this. You can register more than one device on a single Amazon account but you cannot register multiple email addresses and associate them with different devices within a single account.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/dave_fb2c45146b845cea

Option one: Do a soft reboot: "long-press" the power button and the Volume up for about 10-seconds to force a reboot. Option two (the nuclear option), if your tablet continues to freeze, hard reboot to the original factory settings.

Use the power switch up/down? to select 1 though 6. Once you have it on the choice you want (reboot system now?) press the power button. it should reboot.

Press the power button, the volume-up button, or the volume-down button. One of those, or a combination, should do it.

There is a small reset hole to fix the problem .

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

push on power + home button on the other side and until it reboots the device.