Cannot connect to VNC Server

Hi folks,

I'm currently experiencing as strange behavior while trying to connect on a VNC server using the VNC viewer on my laptop.

The connection is done between to machine on a domain.

The connection is set to be done using a Windows password and the group has been added to the security groups.

An error appear that port 5900 cannot be used.

Done a netstat -ano | find "5900" which return the PID

Using that PID with tasklist | find "PID" return that the port is already use by VNC server.

So, I've changed the port for testing, using 65535.

From that point, I can connect but get a black screen.

Questions :

- What can be the reason why the port 5900 cannot be used as is already used by VNC ?

- How can we solve this ?

- How can we avoid the black screen ?

Thanks in advance for your help.

Emmanuel