please help, samsung wave problem with buttons

[Tom.K]

Hello guys, I'm new here, first hello to everyone

I have samsung wave sgh-s8500 and recently i had strange problem which today eveolved to another

first, camera button stopped to respond. actually, it stopped to revoke camera when pressed, but it start to do volume down when you press half (zoom), and nothing when you press to the end

I thought that I installed some bad app because that day I installed few apps and games. so I uninstalled, then updated software and on the end did master reset

of course, problem with camera button still existed, sometimes did not respond at all, sometimes volume down

today in the morning I received message and I wanted to unlock. no respond. so I took battery out and start it and tried to lock and it revokes camera and took picture (without zoom, now lock button works as camera button to the end), but when phone locks, that's it, I can't unlock it anymore

I can live without camera, but lock button is really problem

had anyone seen that problem and have some solution? If I have to disassemble it, it is not problem, just please, if someone can help me with advice or solution

thanks