I resolve this problem this way.
In first about source of the problem - the solder in some contact destroy during some time (2-2.5 year) through temperature conditions. In result lost contact and award as a bright white line (some minutes and good bye, tube!).
I second - how I decide problem.
Please, see this picture -
http://img165.imageshack.us/img165/3280/crw7783sc3.jpg
You see problem areas inside red circle.
I don't open the monitor (this is very difficult), but it age about 4 year and it out of guarantee.
I hack the bottom of the monitor -
http://forum.ixbt.com/post.cgi?id=attach:28:10071:1360:1
and solder this contacts again. (This photo show back side of monitor)
After I try restore hole's edges...
Now my monitor shows without problems!