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Hi sancho_bg, welcome to the Sony Forums
I'm not sure I understand the problem: is the camera not working when you press the shutter?
A constant noise is not normal with this model and probably indicates an internal fault, which is quite possibly related to the problem and which will need to be repaired at a service centre.
If you are in the UK you can register for a Sony-approved repair here or alternatively, ask at a local electronics repair centre for an estimated repair cost.
Cheers
Mick
The problem was identified and removed: gone spring band around the lens. I am from Bulgaria. Thanks anyway