2960s high pitch noise

[dan.letkeman]

Just wondering if anyone has come across a high pitch noise that comes and goes on a 2960s switch?  I have a few that are doing this, but they seem to be working fine.

Thanks,

Dan.

[Reza Sharifi]

It might be that the fans that are getting older and dry. If that is the case, cleaning spray might help.

HTH