My tablet has been running slow lately and is sometimes unresponsive to touch commands. This usually happens while running...

I tried to turn on my tablet by pressing and holding the power/lock screen button, but my device didn't turn on. I have...

Try a different set of headphones first and if that doesn't work, blow compressed air into the audio jack to clean it out. If neither of theses steps work, the audio jack is not functioning properly and will likely need replacing. One other source of the problem could be a loose connection to the audio jack, and in this case, the audio jack would need the connections re-soldiered.