Hi Vahidsafaie,
Welcome to Sony Community!
We're sorry to hear this. It looks like the pencil trick is not working anymore. We recommend sending your unit to the repair center. For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
Regards,
Jen
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