Centos 7.1 hangs, some times no display in monitor during hang

Dear Friends

I have a newly installed server (1 Month old) which is hanging since last two to three days. After a while of inactivity server hangs it goes out of network , makes the server not reachable from ssh login.
In gui after entering user password and pressing enter key it brings back again same login screen.
Also some time server says no input the monitor so display don’t comes. In all situation I am just doing hard boot.

Please guide possible solution how to address this , this server is a critical server for me.


Some of these solutions might be helpful, oher thatn a complete reinstall I don’t know what else could be the issue. Hope it helps!

Hi it was happening only for one user or for all users…?