1. Hi. Lets begin by pressing & holding the Power key for, say, five seconds.
2. Go to Settings and select Restart.
3. Press and hold the F9 key as the tablet restarts.
4. Release F9 when the blue menu appears on screen.
5. Next thing to do is choosing Troubleshoot.
6. Unless you messed up, you are now in the Troubleshoot mode. Good job.