i had followed the instructions
1. Switch off your unit.
2. If your unit is plugged into mains power, switch the power off at the wall.
3. Unplug all cables from the unit and remove the battery.
4. Hold your finger down on the power button for 10 seconds.
5. Wait for 15 minutes, then plug all cables back in, including the battery and switch the power back on at the wall.
6. Switch your unit on.
but still had no effect, any1 else out there know how to fix this?