Hi LiviuC,
Thank you for visiting Sony Community!
If you followed my suggestions on my previous post and having the same result, then most likely its a hardware issue. For further assistance, we kindly recommend visiting our Sony Global Website for information on contacting the Sony Support Center in your region at http://www.sony.net/SonyInfo/Support/. Due to proximity, they are in a better position to respond to your questions or concerns.
Regards,
Vincent
If my post answers your question, please mark it as "Accept as Solution"