A tablet is a rather complex electronic device, so it can malfunction. Some of them can be fixed with a simple reboot, while for others, only a hard reset can help, which resets the tablet to factory settings and erases all personal data.
Before performing a hard reset, it is recommended to remove the SIM and SD card from the tablet. In general, they are not affected during this operation, but just in case it is better not to risk it. If possible, you should make a system backup before rebooting.
In order to make a hard reset on tablets with Google Android, you need to hold down the volume up button and the power button on the turned off device. After a few seconds, the device should vibrate and the Android logo will appear on the screen. Then a menu will open, you can navigate through the items with the volume buttons, and you can enter the items with the power button. Here you need to select Settings, then Format Settings and Reset Android. Performing these steps will result in a reboot, a factory reset and loss of personal information, which, however, you can try to recover by syncing with your Google Account.
To do a hard reset on an iPad tablet, you need to hold down the on / off button and the Home button. After about 10 seconds, the device will start the reboot process. The buttons can be released as soon as you see the Apple logo on the screen. The reboot can take a few minutes, so don't worry.
If you wish, you can do a hard reset on a working tablet as well. To do this, you need to find the corresponding item in the main menu. It's called "Restore and Reset", then "Factory Reset" and "Reset Tablet".
There is no problem in how to hard reset the tablet. Usually this action helps to "cure" 90% of all problems, so if the tablet becomes buggy or refuses to work, you can use this method.