I am a boogie board jot 8.5 owner. My screen wont erase. Here is the full story. I got a boogie board for Christmas. It...

Hello, I am a boogie board jot 8.5 owner. The screen was not erasing. I bought a new cr2016 battery. At first, I did not know how to place it. I went on boogieboard.com then user guide and then It showed me how to put the replacement battery. I did not work (The details where not precise enough). Maybe for you it will but for me it didn't. So anyways, it finally worked! but..... It only erased half the screen. I did not remember how I placed it when It erased half the screen so my hopes where gone. I need someone to show me with precise details of how to place the battery for jot 8.5. I need your help! Thank you. P.S. I hope my little information was helpful