Does not see image, when lens cover is open.

I assume you tryed replacing batteries and all. do you tend to leave the batteries inside the camera for long periods after using it? Clean the inside of the battery compartment contacts with a pencil eraser. If you left the batteries in you likely have contacts that have corroded. Don't push too hard with the pencil eraser but clean them thoroughly.
in case this isn't the issue, chances are something there has gone bad. if warrenty is still viable, use it.

I am having ls755 digital camera model it is giving trouble while getting on lens is is getting stuck inbetween is not comming totaly out batery is also full charged but some times if we on the camera frequiently some times lence come out and camera works please give me the solution my E-mail ID:-application6@mazakindia.com