Have you tried a hard reset? If not, try this.
Power down the phone. If the Event won’t react to a touch of the “Power” key, remove the battery, wait five or ten seconds and then reinsert.
Press and hold the “Power” and “Volume Down” buttons at the same time. Release the “Power” key when the Android logo appears, but keep holding the “Volume Down” key.
Release the “Volume Down” key once the recovery menu appears. Use the “Volume Down” key to navigate the recovery menu and highlight “Wipe Data.”
Press the “Power” key to confirm your choice. Confirm you want to erase all data by using the “Volume Down” key to highlight “Yes” and press the “Power” key to start reset procedures.