I've had it for about two years and it never gave me problems. A little while ago, it froze and I pushed the reset button on the back to restart it (it usually works). It came back on and the black screen came on and said COBY like it usually does then it faded, again like it usually does. Then the COBY came back on, faded, then came back on again. It wouldn't let me turn it off so it just kept doing that until it died. What can I do to fix it?