To troubleshoot a Samsung tablet, you must first identify the exact problem, such as the tablet not turning on, the sound not working or the LED not turning on. The tablet may also have performance issues such as being slow, freezing, displaying error messages, switching off by itself or unexpectedly rebooting.
If the tablet doesn't turn on, its battery could be dead or damaged. Recharge it and retry turning it on. If this fails, try replacing the battery. If this doesn't fix the problem, check whether the charger or power button is faulty.
If the tablet isn't producing sound, check whether there is an object blocking the sound's path. If there isn't any obstruction, check whether the speakers are broken or have an improper connection. If the tablet LED has a problem turning on, check whether the LED light is broken or has a torn wire.
To solve performance issues, perform a soft reset to erase temporary files. If the issues persist, clear the cache of large applications to clear space. Close applications that are running in the background and recheck whether the tablet has low internal memory. If these steps don't solve the performance issues, check whether the tablet is overloaded with widgets.