When we try to start discovery manually, we always see the last discovery result. we couldnt see initilize or searching screen.

Last discovery has been worked 9th march. Although we start discovery process, we cant see different log in CSDiscovery log file.

As you know we havent found a solution yet for other issue which was about topology screen seeing disable.

So what do you think about reinstalling LMS ?

I haven't seen any evidence that there is a problem with your server. If Discovery has locked up, you may be seeing a newly discovered bug, CSCsv42110. There are patches available from TAC, but they have seen mixed results.

In any event, you should open a TAC service request so thread analysis can be done on the running CSDiscovery process.