How to access T350 iDRAC without rebooting

Can somebody explain simply how to find out if the iDRAC is in fact available to look at system logs without rebooting the server?  I have a flashing amber light but can't access the system logs to see the error.  I would like to not wait until the weekend to see what the issue is.  I can find numerous articles' about connecting via to the web interface but nothing tells me if it is even available.  I don't know if it was ever set up or even had to be.  Is the default that it is on?  I have tried the 192.168.0.20 address but got nothing.