Oh! Thanks for answers. I have repear it yet. I Used my Cologne water at first, after I take Soldering Iron and resolder all resistors and capasitors near volum controller. Now it's work, super work))
At the same time I clean all microscheme

what egr said

You'll need to use contact cleaner.  Something along these lines:  http://www.radioshack.com/product/index … Id=2104746
Or whatever similar product is available in your area.  I've had good luck holding the nozzle right up to the edge of the volume wheel (or contrast wheel) and giving it a quick spray.  Then work the wheel all the way back and forth many times.  A bit messy but it works great.

I try to do this, but nothing changed. May be I shoud clean in definite place?

I think it is because of dirt or something, maybe you could clean it with rubbing alcohol, although that may not be a good idea..

Hello Gyes! I have some problem and need your advice.
When I scrolling the knob of the volume my game boy sounds crackling, when I stop scroll it sounds good, how can I stabilize it?