Try a reset. With the power on, press and hold "record" and then press the top left "soft" button over the screen.
(1) did this just start, or did you buy it this way?
(2) is the kwyboard enabled in the "master" menu?
(3) Check the connector to the keyboard and its cable
You need a new battery, but don't expect it to fix THIS problem.
When the wise man points to the stars, the fool looks at the finger.